Just one tour and see what the results and response is. Of course in this tour there would be exceptions, like fighters could still HO bombers vice versa and a 410 and the like could still HO those unwise enough to go HO with them. 
I know we'd see some guys scores plummet.  

It's very frustrating to climb to alt, prepare for a dog fight, get boxed into having no choice but to merge similar alt with a comparable fighter and get shot in the face. In said circumstances if I turn/dive I give up my position, tactic and/or energy.   
 
    
Or better yet make the HO killshoot the HO'er.  
If the result is one of welcome, how about an MA where HO's as described are off? 

Rot