Last time I have record of playing online was 2012, but I may have tried a month or two since then. The game looks exactly the same as it did then, two and a half years ago, save that a few more of the AHI models have been updated and planes have been added. Only three versions have come out since I last played online. I do install and fly new planes when they come out so I guess the last time I 'saw' Aces High on my own computer was when the Tu-2 came out however many months ago. (I also updated a couple of my skins when bump and spec mapping came out)
I can see that the game still invokes 90s nostalgia. I can see that, even as a former subscriber with a huge interest in WWII aviation, even a former content creator, the barriers of dated appearance and feel of the game which drives away new players. Maybe Aces High will never look as good as a high fidelity sim or an arcade game, but it has to at least look like it's from this decade.
The online gameplay is moot. I can't even get to that point to be disappointed or not.
For the record, I don't think HTC is incompetent at game creation, they made a game that I loved for a long, long time and invested hundreds of dollars and hours into. I do think it's clear that the staff is too small for the specialization and volume of new content that's needed to bring the game back. At least to get people to feel like trying to learn how to play it once they've downloaded it instead of being put off.