Sitting on a planet for many turns while it slowing dies is not fun, early game or late game. I conquest maps on Moo3 compeletely many times and SoTS1 as well ( that was better at that),, becasue I want to kill every in all my games.
Else I would leave on win by 5X and be done with it. I do not mind the number of planets or the time to get to them all, I just hate that it take so many turns to kill one planet and they may have several planets.
My issue is the is no bombs to kill off a planet in a turn or tw o or even three. It can take dozens of turns, if you do not send troops to finish them once they get very low. What if I do not want that planet, hence I do not use troops and hence it takes way too long.
I guess I never really found it to be an issue that took that long, dozens of turns? maybe if you are "glassing" an entire system full of colonies, but surely not for just one. Early on using troops makes sense because you want more planets, and later on your weapons are stronger and they do in fact glass a planet faster. Really though that's part of the reason why moo3 was a failure from a business standpoint, it's a very very slow paced game by comparison to things like SEIV, moo2, sots1