Just beaten this, thoughts below:
+Reasonable variety of missions e.g. flying below radars, standard combat, ATG, defending bases etc, sea/land missions
+Runs pretty well and looks "ok"
+A few enhancements over HAWX like cockpit view, takeoff, landing, refuelling etc
+Couple of nice missions/set pieces like fighting around oil rigs, shooting down nuclear missiles etc
-The sense of scale just feels totally wrong, you move WAY to slowly in relation to the ground i.e. 600mph and it feels like you are about to stall. Then when flying by mountain ranges, again it feels totally out of kilter, the terrain just somehow feels artificial and too small, it looks like you'd expect to see from 10000+ feet but you're actually at only like 1500ft altitude. In some sections of the game crashing into the ground was more of a risk than being shot down because of this nonsense
-Cannon seems overpowered i.e. seems to have long range and rips things apart even if you aren't that accurate, in some fights vs aircraft it is actually better than missiles
-Can't choose plane loadout
-Feels like a Modern Warfare rip off in places, with the drone missions (done badly and not half as fun as COD) and playing the role of 3 pilots from different countries
-Storyline feels disjointed, there is some Russian seperatists, and some russians, and then some yanks getting involved, and then I'm defending the Kremlin for some reason, I'm not sure from whom, or for what reason
-Difficulty isn't very well balanced, it's kinda like 80% of the game is really easy, 10% about right and then 10% an absolute ballache (typically defense missions)
-Dogfighting suffers from the same affliction as Darkstar One, in that often you just end up circling round the same enemy for minutes on end until you finally get the drop on them
Overall I would say this is a backward step from the original, which was by no means a great game but at least it executed reasonably well on what it set out to do whereas this feels dirty, almost what you'd expect if someone took a random game engine not designed for a flight game and then shoe-horned flight mechanics into it.