I have to say that I like limited fleet capacity. Sure I would like more, but it would detract from the function of the game, it would simply become hide in a defended corner and build so many ships that you can never be attacked and then in one pass destroy everysingle other player in the game. NO planning, no risks, just mass throwing of ships at enemy's.
In warcraft 3 i think I first saw this, even if you kep building farms, you hit a maximum unit capacity, removing some of the build and toss with abandon part and start picking strategic targets and fortifications.
The 102 planet map I am playing is fun and I am nicely fortified in my 2 star systems with a fleet running harrassment on those that annoy me, however, when the game gets near the end, I'm going to have some fun management issues that I don't see as bad, just anouther challenge.