@SD
I would love automatic migration between planets but that doesn't seem like something SD is even considering.
I think citizen specialization could be good if done well but really is probably just more micromanagement. I really think that tiles on planets is redundant, let me just build twice the number of buildings of the planet class, put them down randomly and kill adjacency, and use the production wheel for micro.
I'm also not a fan of the current terraforming scheme, a home world should be nearly maxed out for tiles or class its the optimal environment for that race, why do can't they use half of their home planet until late game? This makes no sense to me. Having to terraform nearly every other planet you colonize, completely on board with that, to make those planets perfect for human life they should have to be adjusted. I would also like to be able to terraform more earlier. Before anyone calls pacing or balance on me, I want a faster paced game. I want to get to those huge empires and battles quickly and spend the majority of the game dealing with massive space battles and appeasing the guys I'm not ready to fight while I crush the guy I'm conquering or figuring out how I'm going to fight a 2 or more front war.
I would absolutely love a revamped tech tree, its boring as it is. I can't think of a single tech that I have gotten excited about so far in the beta. Star Gates, Inertialess drives, planet building(turn asteroids into planets), the ability to build a ring world or Dyson sphere. Amazing stuff, its not in there yet if its planned.
If you look at the tech tree, there are other options for planetary invasions, including just orbital bombardment in the tree already they just aren't implemented. Should be in December.