While I don't think the spixteen should be perked since in the hands of a noob it gives them a decent chance at survival, I do believe that it, along with other 'state of the art' aircraft should be tied to large airfields that could support the upkeep and maintenance of such planes. A list of aircraft I believe should be large field only are:
B-29
AR234
ME262
Spitfire XIV and XVI
Tempest
Ta152
(ME163 excluded for obvious reasons)
These aircraft in my opinion were seen less in conflict, and had smaller theatres of operation due to the fact that they were new, required a lot of logistical support, and in instances of the B-29, 234 and 262 simply couldn't take off from many air fields. There are a ton of things this could help effect in game play from the realism side of fuel consumption and throttle control to the tactical side of making certain fields worth more and actually worth attacking or defending.
Flame on...