Lets say, leaving comunity for 2 years without saying anything isnt fine..
Okay my suggestion for you our dear developers is simple:
Divide. Big. Updates.
Dividing updates on lots of small ones on one theme, would make it easier to controll on what stage the bug or memory leak was created, making it easier to find and fix(rather than finding it in that amount of code in current game playtest) and leaving game a bit more alive, also having a feedback from players on updates you make knowing what your community thinks about game and what could be changed.
Good luck.