IMO some matchups that became easier are:
Ryu (5.5/4.5)
Not being able to air Tatsu out of the corner anymore makes it much easier to pressure him in the corner. C.MK nerf is noticable too.
Chun Li (5/5)
Chun Li has weak Anti-air options, but her LK Flipkick was actually a really effective Anti-air against Gen in Super. It completely stuffs all of Gen’s jump-ins, and even during those rare occasions where you’re able to trade, she can always follow up with a Kikoshi/EX Lightning Legs, and so the trade is always heavily in her favor. The LK Flipkick has 2 extra frames of startup now (Went from 8 in Super to 10 in AE), and so this nerf makes it easier for Gen to get in on her.
Dhalsim (5.5/4.5)
I believe this matchip is still in Dhalsim’s favor, but easier since his Defensive game is weakened due to losing some priority on normals, resulting in them trading more often. He also lost damage on some of his moves too. I think U2 is definitely the must-have Ultra in this matchup now.
Cammy (5.5/4.5)
Her offensive game really is much weaker, although I can say that her normals are much better though. Her TKCS, as far as I see, was the only thing about her that gave Gen real problems. She’s still able to do them off EX, but she has less opportunities to do it.
Guile (5.5/4.5)
I believe this matchup is still slightly in Guile’s favor, but definitely a significant improvement from Super. Gen is able to take more risks and last longer due to Guile being much weaker in terms of all around damage. The Meter gain nerf helps out alot too since Guile has alot less opportunities to use EX Booms/EX Flashkick, and/or use meter to FADC. His Air Throw also has a slower startup, and so it’s also alittle easier going air-to-air with him.
Rose (5/5)
Her Soul Spark Meter gain was nerfed, and also she’s not able to bait you out with a Soul Spark anymore and then use the Super to catch you while jumping over it. With Soul Satellite losing Complete Invincibility, she’s also more vulnerable upclose.
Zangief (6/4)
EX GH not knocking down anymore helps out alot, but this matchup is still in Gief’s favor. His corner pressure is more deadly with the increased LP SPD range and his new U2, but overall this matchup is easier though.
Vega (5/5)
Even in Super, I’ve always felt that Vega was one of Gen’s most easiest matchups. His Cosmic Heel is much less useful now (Due to the difficulty of spacing it safely by hitting with the tip of his foot) and so his mixup game is weaker. He also received quite a few damage reductions here and there, and so Gen has more health to work with and is able to take more risks. His wakeup hasn’t changed, and is still really weak. With Gen’s new Mantis C.MP, I really believe that Gen is now able to rival Vega’s pokes now.
IMO some matchups that became harder are:
Sakura (7/3)
I know that 7/3 in Sakura’s favor might sound alittle excessive, but hear me out. It’s kinda like the Viper matchup now. All Sakura needs is one opportunity to get in on you to do one of her long and drawn out combos, and after that just land a few more successful hits and then you’re stunned. When you’re stunned, she’ll do another one of her combos and by that time all it really takes is a few more hits from her at the most and then you’re done. She can capitalize on just a few opportunities tremendously, better then most other characters, and so there’s very little room for error when it comes to Sakura now.
Makoto (6/4)
Her Mixup/Pressure game is alot stronger. She’s not sluggish anymore like in Super where it feels like she lags with everything she does.
I still believe that a good amount of Gen’s matchups that improved are still in his opponent’s favor, but not by alot though. Some matchups in Super that we’re 6/4 in his opponents favor are more like 5.5/4.5 in their favor or even 5/5 now. The fact that he’s able to win much more consistantly now convinces me that Gen is a solid character in AE. He’s still somewhat underpowered though, largely because he’s still too fragile for his health/stun and his momentum being easily broken when upclose mixup/offensive pressure is applied on him. He’s a good character though.