Deja,
Promote base capture? Um.. what game have you been playing? 75% of what goes on in the arena right now is an attempt at base capture. All you are really talking about is an attempt to make base capture easier. Once again... why do you think more hangars were added recently? It was not to make base capture easier.Hehehe, I think the same as you, but at a different time zone

I wold say in my timezone it's better to talk about 25% lone buff porking fuel/ammo in random bases, 25% actual field capture attempts and 50% vulching/furballing. Maybe I'm wrong, this is my subjective perception.
As for limiting planes... I'm trying to think what would be easier... vulching a field where I knew a plane could only spawn every X seconds... or where as many planes could spawn as the enemy was willing to sacrifice. One I could vulch easier than the other... and I don't think its the one you are thinking.Hmmmmm....first question: What would wou find easier to vulch, 5 C.202 respawners at a time, or one single N1K2 respawning each X seconds (let's assume you have a 4 fighter-strong CAP, and all but one hangar has been destroyed)? Second question: What would be closer to a simulation, a no limit, no order, free-for-all instant respawn, or a regular cadency, one by one, respawn, in relation to damage taken by the airfield? (on a side note, I would let spawning only at intact hangars

)
Anyone will be able to fly from the base.. not a random few. If you are willing to sacrifice yourself to defend a base... its not going to matter much what you do it in. It will matter that you are not allowed to try.
Once again.. the limiting of type would not really help much in a vulching scenario. It would only help in more of a strategic sense arena wide. A hit on a hangar nearby a field you are planning to take means no Perkies could fly from that field for 15 mins... or no N1Ks or La-7. I slightly disagree with this one. From my point of view, plane type does makes a difference. Let's use an example, you are limited to 1 plane each 3 seconds, no type limitation. You respawn in a cannon armed bird, you have one small possibility to kill on a HO shot a poorly set attack, attacker that is definitely farther than 3 seconds. It's a small possibility, but still it is one. On the other side, you are limited to an unlimit C.202 flow. 3 attackers can (again, in my opinion) quite easily keep this respawners low and, basically, dead. Besides that, the occasional

Goon would face worse odds against a cannon bird, in snapshot terms.
We are arguing here on different approaches to the same concepts: base damage should be progressive, base capture should be difficcult, and a well timed, coordinated effort should be rewarded against a bad executed one. I think yours is valid and an improvement over what we currently have, although I think a plane number limitation will be less restrictive and closer to a real situation.
Cheers,
Pepe