Track IR doesn't offer much of an advantage in AH Straffo. Been there done that tried it for a couple of weeks but decided against it. AH view system is great anyway and there is no need to TIR. I might try it again soon but doubt my ideas of it will change.
Thanks to the friendly/free view system in AH it is more of a personal preference that makes someone chose TIR over normal view system. Just like someone prefers one stick over another.
In other words, you want everyone to be disadvantaged for aesthetic reasons. As for enabling difficulty or not, people already do that with icons, stall limiters, combat trim, etc.
Icons are enabled for everybody unless you yourself decide to turn it off. No advantages to be gained there.
Stall limiter limits your maximum angle of attack and thus gives you a disadvantage, not an advantage.
Combat trim does make aiming a bit easier but is bad in some planes. It kind of makes up for using the keys of the keyboard instead of real trim tabs in a real plane. Not sure of all the different trim tabs/rotaries etc used in WW2 fighters but the ones used in most planes today work far faster then the trim in AH. I often find that it takes too long for the trim to go from fully negative to fully possitive in AH. It's a minor issue though.
What would the "etc" be?
What would next step after removing cockpit bars be? Remove cockpit alltogether ala MS Combat sim?