Perhaps adjust the flight model of the SPADs? They seem awfully easy to stall, which for a fighter that was considered one of the best Allied fighters of the war, seems a bit unrealistic.
Which SPAD? VII or XIII?
I've gotten quite a bit of stick time in on the VII lately and I've found it very effective & haven't had any problems with stalling (which isn't to say I *haven't* stalled - it's just that when I *have* stalled, I deserved it!!!)
It's a very able fighter, when fought properly - you're not going to win many turning battles with it, so the trick is to keep your energy level up and seek an advantage in altitude that will let you dive on your foe.
