Topic: Game's passivity is a problem
This is an aspect that should be addressed though not convenient to most it is sometimes the main reason it keeps many players from logging in, and get active.
EP accumlation:
I really like the time based skill system, though there is really no incentive to log in. I wouldn't like the Eve system either, but there should be rewards for players who keep active. Subs are well and good, but if they are not logging in they don't provide the activity urgently needed.
MPC system:
Once setup no actual input or work is required to maintain. The energy just keeps flowing from the reactor out of thin air. There needs to be resource in place to keep those structures going with some player input or work, if not they will shut down, cease to work and other players can just take over your base.
Balance these out well should make people get more active and actually give them reasons to log, other than just amassing wealth.