I'm all for improving things. I'd kill for Construct to load animations into the animation sequencer faster, and for layouts to load faster in "run layout" because that's been a nagging thing for me, but certainly not a program killer.
Above all though, hoping that the event system in C2 and the basic operations of creating the Construct way
remains the same with only necessary improvements, because I find Construct's current system to be the most straight-forward and in my opinion the best event-based system available. So in other words; I'm hoping they can fix what's broken, but don't fix what ain't