This game is far easier than BB. Both in it's basic mechanics and advanced mechanics. That was the idea. Im not saying it's better or worse, i mean i love both games so far, it's just different and more straight forward.
It really isn't. Unfortunately, the only thing that P4A does simpler than BB is in inputs by removing half-circle, 360s, and dragon-punch motions. Everything else in P4A is just as complex (and perhaps more overt) as Blazblue, maybe more so.
Blazblue doesn't have status ailments, whereas P4A does. There's no confusion, silence, paralysis, poison, charm, rage, or freeze ailment in BB (at least for freeze, not anymore). Blazblue doesn't have a manual aerial face-switch or air turn (jump A+C). Blazblue only has two types of bursts, where as P4A has three. And only one character in Blazblue has EX-style specials, whereas the entire cast in P4A has at least one.
Yeah, P4A is easier because there's less joystick inputs, but there's a lot more button combinations that are rather required for many combos or usage of certain universals. P4A also has much tighter windows for combo inputs compared to the modern BB games (thanks to universal gatlings) compared to P4A. BB does have a lot of different systems and nuance, yes, but its all undercurrent - not really necessary to truly understand or use everything offered in the game to play well, or to play specific characters. Unlike P4A where you do need to know that you can only short-hop while under the effects of paralysis. Or you that you can't use your C and D abilities while under the effects of silence. Or that whenever you use your R-Action it temporarily depletes your health. There's no Awakening specific abilities in Blazblue, either.
So no, P4A isn't more straightforward in basic or advanced mechanics. There are far more overt mechanics that players need to learn and pay attention to in P4A than in BB.