1. Engineers:
- RNG/Roulette
"Engineers" :S instead of specific science based results, like in RL engineering.
- Silly, preposterous, illogical and fantasy-based loops to gather "exotic" materials, that cannot be simply purchased in a station, as opposed to real life, where, if you need materials, you go to a supply store to get them.
- Allowing the purchase of Elements like Gold/Silver/Platinum... in stations, but not the "Engineering" Elements. In RL, they are all just Elements and they are all mined, refined and sold in much the same way.
The persons responsible for implementing Engineers, clearly have no notion how RL engineering works.
2. Spaceship Realism:
- Speed limit in space while using conventional drives. :O
- No inertial mechanics, except if you turn Flight Assist OFF.
- No RL orbital mechanics used for landing. Instead we have "Glide" mode for planets
without atmosphere. [ugh]
- No BVR combat. Sensors limited to 8 km, while RL planes can reach 300km in a less beneficial environment (air).

- Sound in space. [wacky]
- Mass lock by other ships. [wacko] Only planetary-sized objects should have sufficient gravity to mass lock ships. You know, like in RL...
- Calling Rockets "Dumb-fire Missiles", while the very definition of Missile is, in itself, a Guided Rocket. [haha]
Yeah!! Real hard science-fiction simulation here...
3. Mission System:
Boring/frustrating/lobotomized mission system. No interaction with NPCs. Only walls of text depicting "shopping list" missions. No emergent story loops with NPCs, spanning several missions, generated differently based on the outcomes of previous events.
4. Planets:
Monotonous looking planets.
Beigeification and lack of ground/material variety in each planet. You see one, you've seen them all. Unlike in RL, in our solar system, where even similar bodies with similar compositions, have very different appearances.
5. Story:
News, plots, and lore, as well as the "great mystery" of the Salomé/Thargoid War/INRA, being inserted manually and spoon fed by FD, instead of using an automated dynamic system for this to appear based on the BGS.