I'll be sharing my impressions as an FE2 newbie in this thread. I'm currently on stock/vanilla/unmodded FE2. I'll be comparing to RoF and Il-2 FC, but I must note that I haven't spent many hours there either.
1. I spent some time configuring yaw input from rudder pedals, because at first they didn't want to work, no matter what I changed in the relevant ini file. Finally, after unplugging and plugging them again to the USB port they started working. The issue was that first time they were improperly detected by FE2 - I saw two identical entries device names in the mentioned ini file. Properly recognised by FE2 they show up as two differently named devices (yaw and brakes axes). Interestingly though, they worked properly in RoF even when they were improperly recognised by FE2. So I guess it's rather FE2, not Windows issue.
2. Maybe that's only some kind of setting or my system issue, but after switching away from the game windows with Alt-Tab it's impossible to go back to it. I need to force-quit it. WIndows 11.
3. Aircraft seem to be more pleasant (easier) to fly than in RoF (FC is in between, but still much closer to RoF than FE2). I think it means less realistic FM compared to RoF/FC. Lack of engine management (except throttle and blip switch) also makes FE2 FM less realistic, but more enjoyable when you just want to have fun and not fight with the aircraft you're flying. I also haven't noticed any gyroscopic effect of rotary engines yet in FE2.
4. DM - I saw some parts flying off of the opponent's aircraft, which is nice. Graphics are not modern in FE2, so it's hard to judge just how good the DM is, especially if you hit your enemy from a distance. I also don't think that pilots could actually hear anything other than engine, machine guns and wind, so it seems that sounds of your bullets hitting the enemy aircraft are unrealistic.
5. Missions are quick, dynamic, filled with action and opponents. Nice! RoF seems to be a bit empty and slow-paced. AI seems to be better in FE2 at a first glance, but I need to go back to RoF/FC and play a bit more, verifying what difficulty settings I use.
6. So far I've had fun with it and my impressions are positive, which may not be obvious from the points above . I'm looking forward to playing campaigns, using community mods, taking pretty screenshots, etc.