I see what you're looking for with this thread. You want to know about what gameplay mechanics we want, not little fiddly details like FM or AI tweaks.

So, for gameplay elements.

Co-op mission / campaign generator. The IL-2 DCG does an OK job of it, Lowengrin made a much better one. This is badly needed. Nobody wants to spend hours and hours making single missions.

Something like SEOW for online VS campaigns.

Now that I think about this, these things were alluded to as things that would come with CLOD back when it was called Storm of War... what happened?

One fiddly technical bit that I just can't help but bring up (sorry); this game sorely needs a map / plane icon system like 777 Studios did for Rise of Flight. It's the only thing I can think of to end the current situation with the online community right now, which is people demanding full realism and then flying at treetop level (or below because LOL no tree collision) because there's no reflection off of cockpit glass making planes damn near invisible when they're below you.