First off, a lot of those concessions were made to make it possible for new people to get into the game and actually get up flying. My job as a trainer is complicated enough, no need to make it worse please.
Also, Targetware has a lot of advanced engine management and realism.
Go log into a server there and see how many are online. Then log back into AH.
Seems pretty obvious that people are voting with their feet.
If HTC wanted to add a few touches that would reward players for advanced engine managment without penalizing those who don't, well yes I'd be interested. But thats a tough can of worms to open, and adds a whole lot of coad for not much playability.
There are a lot of things I'd love to see added to AH, most of those mentioned are pretty low on the list.
Better damage modeling, better gunnery ballistics modeling, Seaplanes and floatplanes and cockpits that open are just a few on the top of my list.