The timed scenarios are horrible and defeat the most enjoyable part of the game, which is to take time and make parks beautiful and beneficial for the animals. If there were an option after completing the regular career to start a timed challenge, that would be fine. ALL of the newest DLC ONLY...
I like scenarios and challenge they offer, so I was looking forward for new scenarios in 1.3 patch. But as I played through both of them on hard I realized fatal flaw of timed scenario in games like planet zoo and why they just suck and are frustrating. In the end I was able to finish dlcs one...