Better be a whole slew of quality of life improvements. Because I remember DAH being the most ball busting GTA clone I've ever played and that's saying something.
Also Mercenaries PoD remaster when you damn dirty apes.
And yeah, it will definitely need more improvements than just the 'lol improve the grafix' that Namco did with Ace Combat 5. I do hope it stays hard though, just maybe not as hard.