I'm gonna chime in here. This is concerning the 1.1.4 update which reduced all of Roy's relevant (for landing) aerials by 2 frames.
The first one I want to talk about is nair. The second hit of nair is almost as safe as Captain Falcon's falling up air is now. It's behind by like 2 frames or so. If we had a jab as fast as Falcons it means we could beat shield grabs with a jab after nair every time lol. The good news with this though is that, as long as you are outside the reach of their OOS options, nair hit 2 is now perfectly safe on shield, since anything they have to drop shield to do is guaranteed to be beaten by any of our tilts/jab whatever. Fair is also similarly safer, and MAYBE bair too but I don't think thats a very good option to hit a shield with. The other two reductions are nice but don't really make the moves any better to land with except maybe letting us combo into bair from falling up air easier.
EDIT: By the way, the reduction in fair's landing lag now allows you to basically chain throw certain people with fthrows, guaranteed, by doing fthrow-> SH fair(sour), fastfall after the hit -> grab -> Fthrow* ..... until you reach the end of the stage, from around 20 to around 60 or so. If they try to DI up, then you can just air combo them for more damage with fair into blazer or whatever you want. This doesn't tend nto work well vs very floaty characters though, so your mileage may vary.