Thanks for the bug report (and continuing to play our game)! It's a bit of a lengthy post so I'll have to address the issues separately.
For the issues with the UOO mission, this should be fixed on the 5.17 update. However, you'll need to load from a save on day 283 or earlier as the prerequisite for the uoo bridge mission to trigger will get broken on day 284, and the fixes on 5.17 won't be able to fix a campaign in a bugged state.
The reaper zombies should be fixed on 5.17, please let us know if that is not the case!
For the objects remaining after being visually destroyed, when you encounter it again, can you send the save over (or send a screenshot), this will allow us to check whether there's a bigger problem with the destruction states or if it might be just an asset setup issue.
The doors are still a bit buggy as we've recently changed the way they work. We're still working towards a fix for the currently reported bugs. Although for the MARS/ARES still not being able to pass through, can you hand over the save when this happens? I tried testing this a bit and they work fine on my end