eh, I hope it's a little more complicated than that...a fixed resource system for each planet is kinda...nye. I mean you wouldn't expect to mine for resources and stuff like that on Coruscant. More like all you factories and such would be there rather than farms and mines. ya know?
I mean sure you might be able to make money off of taxing the factories and such...but that's probably more complex than they'll make it.
Although it might be pretty good to have bonuses for planets if they arn't going in depth. (if they were though, a high population would be bonus enough with such huge taxes coming out of that region, etc...but like i said, I don't think they'll end up making it a Total War game...bit more streamlined than total war)