Funny - I also keep checking back here even after I quit playing AH months ago. I am now playing some other WW2 flying game which does almost everything better (and I am a total hardcore simmer).
Anyway - HT really has no option but to ride this as far as it would go. The old guys (I am young, only 50) don´t want or can´t adapt to a new game, so they will pay the bills here. Changing the game radically to appeal to the younger crowd will not work - Aces High can´t compete visually to these other games by a long shot. It will never draw young players.
The chance to compete with the new and hungry companies from Russia has come and gone many years ago - get a dozen artists and young talents and do something that appeals to the masses (action, graphics, awesomeness!!) to fund development.
The game I play now is mostly a huge furball with arcade-type shooting...but this funds a small spinoff called "simulator mode" where the fidelity and realism is on par with Aces High (there aren´t even labels for enemy planes!!) where geeks like me can enjoy "enduring confrontation" style combat that lasts a few hours and sports great action (bolstered by use of AI drones where needed). Oh, and I haven´t paid a single cent for it and having a ball, just researched past the 190-D9...
Aces High holds a special place in my heart, I played it since it came out...but it took the wrong turn when "Combat Tour" was cancelled and has been going a one-way dead-end road ever since. The voice of the "old farts" that want everything to stay the same and oppose every change has actually sealed its fate. The only consensus has been "this game needs more airplanes

" Guess what - it won´t stay the same by staying the same. It will be gone.
Cheers, Jan