Got some ideas for buildings and landscaping details, and a small list of dinosaurs at the end as a bonus read! 
BUILDINGS
• Walkways/Bridges or Tunnels for visitors to reach the other side of a paddock, (if it's a tunnel it'll be inaccessible by vehicles and dinosaurs ofcourse).
• 360° Viewing tower/dome/bunker placeable inside a paddock for visitors to be able to see the enclosure from within, accessible through tunnel/elevated walkway.
LANDSCAPING
• Deep water that prevents passage by both dinosaurs and vehicles.
Since it could make players use it as fences and kinda cheat missions with them you could have agitated dinosaurs swim across with a risk of drowning? Or limit its use to sandbox.
• Waterfalls. Could be a selection of pre-made ones that needs a slope to be placed or that will create a steep slope when placed. Should be rather easy to implement?
• Cliffsides, similar to waterfalls but without water. Some variants could even have vegetation on them!
• Prehistoric plants/trees.
DINOSAUR WISH LIST
• Therizinosaurus ( quills/feathersssss!!! And please take some ideas from The Isle/The Stomping Land, not a big fan of the plucked chicken look xD )
• Yutyrannosaurus (featherrrrsssss!!!!!!)
• Oviraptor/Gigantoraptor/Anzu (variants of the Oviraptor-family)
• Sinotyrannus/Concavenator (awesome-looking medium carnivores)
• Amargasaurus/Agustinia (sauropods with spines/sails)
• Charonosaurus (basically a parasauruslophus but with a chance to give it a more scientifically accurate sound)
• Shantungosaurus/Magnapaulia (huuuuuge hadrosaurs).
• Sarcosuchus (!)
I wish for more colourful hues, intriguing dinosaurs with exotic shapes, and dinosaurs that sound spooky, otherworldly, birdlike and beautiful. Make them chirp, click, sing like birds, croak like crows or boom like foghorns in the mist... also add mist.
Here's a link to bird noises in slow motion to give you some ideas of what some dinosaurs could've sounded like!
Source: https://youtu.be/bj36koXYJLs
Edit:
WEATHER
More types of weather (aside from tropical storms), like fog/mist that reduce visibility and maybe you then need to research thermal scopes if you want to be able to tranquilize dinosaurs hiding in it. Some days could be a little more windy than others without bothering dinosaurs. Maybe some lightning that spooks dinosaurs and creates power failures without damaging anything?
GAME PLAY FEATURE
Transport dinosaurs to other islands feature! Would be nice to be able to send a tranquilized dino off like when you sell them but then be able to call for it to be delivered onto another isle. Only in campaign mode tho and not from Isla Nublar. Could have a big transport fee that you would need to pay on arrival. Or maybe you could just have a random list of dinosaurs sold from other parks.. and then sometimes they bring diseases with them or becomes agitated for a few minutes.
Thanks for reading, hope you have a most pleasant day!
Special thanks to the devs for this brilliant game, for listening to the players and continuously bringing us new content. ❤

BUILDINGS
• Walkways/Bridges or Tunnels for visitors to reach the other side of a paddock, (if it's a tunnel it'll be inaccessible by vehicles and dinosaurs ofcourse).
• 360° Viewing tower/dome/bunker placeable inside a paddock for visitors to be able to see the enclosure from within, accessible through tunnel/elevated walkway.
LANDSCAPING
• Deep water that prevents passage by both dinosaurs and vehicles.
Since it could make players use it as fences and kinda cheat missions with them you could have agitated dinosaurs swim across with a risk of drowning? Or limit its use to sandbox.
• Waterfalls. Could be a selection of pre-made ones that needs a slope to be placed or that will create a steep slope when placed. Should be rather easy to implement?
• Cliffsides, similar to waterfalls but without water. Some variants could even have vegetation on them!
• Prehistoric plants/trees.
DINOSAUR WISH LIST
• Therizinosaurus ( quills/feathersssss!!! And please take some ideas from The Isle/The Stomping Land, not a big fan of the plucked chicken look xD )
• Yutyrannosaurus (featherrrrsssss!!!!!!)
• Oviraptor/Gigantoraptor/Anzu (variants of the Oviraptor-family)
• Sinotyrannus/Concavenator (awesome-looking medium carnivores)
• Amargasaurus/Agustinia (sauropods with spines/sails)
• Charonosaurus (basically a parasauruslophus but with a chance to give it a more scientifically accurate sound)
• Shantungosaurus/Magnapaulia (huuuuuge hadrosaurs).
• Sarcosuchus (!)
I wish for more colourful hues, intriguing dinosaurs with exotic shapes, and dinosaurs that sound spooky, otherworldly, birdlike and beautiful. Make them chirp, click, sing like birds, croak like crows or boom like foghorns in the mist... also add mist.
Here's a link to bird noises in slow motion to give you some ideas of what some dinosaurs could've sounded like!
Source: https://youtu.be/bj36koXYJLs
Edit:
WEATHER
More types of weather (aside from tropical storms), like fog/mist that reduce visibility and maybe you then need to research thermal scopes if you want to be able to tranquilize dinosaurs hiding in it. Some days could be a little more windy than others without bothering dinosaurs. Maybe some lightning that spooks dinosaurs and creates power failures without damaging anything?
GAME PLAY FEATURE
Transport dinosaurs to other islands feature! Would be nice to be able to send a tranquilized dino off like when you sell them but then be able to call for it to be delivered onto another isle. Only in campaign mode tho and not from Isla Nublar. Could have a big transport fee that you would need to pay on arrival. Or maybe you could just have a random list of dinosaurs sold from other parks.. and then sometimes they bring diseases with them or becomes agitated for a few minutes.
Thanks for reading, hope you have a most pleasant day!

Special thanks to the devs for this brilliant game, for listening to the players and continuously bringing us new content. ❤
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