I think a better solution would be to increase how much they cost to spawn. Limiting players to what they can use is annoying. You only have to be on the end of the '32/32 structures so I can't build what I need' issue to know that limiting that way isn't fun.
Had this last night in Zones. We only had our own base (as usual) and they had somehow used 32 structures in it, which kept me from building an outpost elsewhere.
LOVE Warhawk, and am mostly loving Starhawk, but there are some real problems with how games play out compared to Warhawk.
-In Warhawk no matter how badly your base was being dominated, I could get out to a small base elsewhere and cap it and people could spawn there. Very rarely could another team keep everyone contained within the main base. In Starhawk, You have to first wait for enough rift to build an outpost which can be exceptionally difficult when you die instantly after spawning, then you have to go to where you want to put the outpost, only to have it destroyed seconds later. The spawn on player is helpful, but by far not enough.
-The B&B system has made the game effectively base A vs base B and rarely (except zones) do I see bases being setup anywhere else on the map, and when I do, they are destroyed very quickly. I really think they should have smaller bases scattered on the map that can be capped like Warhawk, but only have a permanent outpost rather than a full base, still allowing you to use the b&b to make a custom base around it. Also, I think structures might need to be harder to destroy at an actual base compared to say at a base made just in the middle of nowhere.
-Loadouts are setup badly. I understand the need to convey the available tech in the game list, but the loadouts are meaningless and the default should be everything. There is no loadout for all the tech which is odd.
-Weapon spawns need to be more prevalent. I and some friends are finding ourselves using the rifle almost all the time. I think in addition to the various weapon spawns on the map, they should maybe add more weapons that spawn with structures. Going so far out of the way just to get a wrench, mines, grinder, pistol makes them of little use.
-A lot of things in Starhawk are poorly or not at all explained. Various icons, the loadout system & some other things are simply not mentioned anywhere which is annoying.
They supported the hell out of Warhawk, and I'm sure they will fix a lot of the issues in Starhawk so I'm not too bummed, just wish some of this stuff worked together a bit better already.