Really hope you are right there.
Dont get me wrong... another 50 is nothing, it's not about that cash; but what really worries me that focus will shift too soon to that new and shiny thing and much needed polish and improvements for the "basic" game are put on the list way, way down.
I share your concern 100%. It's an unfortunate state of affaris that "new and improved mining mechanics, and fleshed out mission system" will move way fewer boxes than "PLANETARY LANDINGS OMGZ!"
Our main hope is that FD will do the right thing, and divert a sizable portion of the funds from the expansion towards improving the core game, rather than the next shiny expansion.