I guess we'll pretend that this rework is not a straight downgrade in every way except two.
First, her heal gives at around 300 AP which was normal for old and new kayle alike, the new heal gives about 10% more movespeed, even though its a shorter duration, it will still take you further than than the pre rework movespeed would have.
Secondly is her ability to kill tanks, which is stronger post 16, because of the true damage.
Her new Q deals 10 less base damage, and scales 10% less with ap, and is a skillshot, W is a fat solo heal nerf at level 18 with 300 ap, its around a 200 heal nerf.
E does the same damage it used to while turned one, once you get waves and max it out, but it scales with 10% more ap than it used to (this is the part where you say "AH ha! i knew it, absolutely broken") except the part where i cant auto during the Q cast time, which while admittedly you couldnt cast during old q, it cancelled a single auto, not 3-4.
You also cant auto during the W, which you could with old but maybe that was op? who can say, since apparently old kayle "sucked"
E, the new execute is admittedly, very nice however, once again, it cancels atleast 2 autos, if not 3, during the cast time, and is only quite good at later levels where you can burst squishies extremely fast, or against tanks
The ulti. where do i even begin. its a giant gimmick. against melee its insanely powerful, against ranged, its literally useless unless i have flash, or they're mindlessly running into my toes. did i also mention, that ONCE AGAIN. i can't attack for around 1.5/2s during the cast, which RIOT i dont think i can possibly convey how bad that feels. I certainly never asked for an ulti that does damage but locks me out of everything. did i say everything? i meant LITERALLY EVERYTHING. you cant zhonyas (to my knowledge. havent actually tried), gunblade, auto, cast any other ability, including being unable to turn e on even though its a passive auto enhancer like nasus q, im literally just stuck running at you, and hoping i can run at you faster than you can run away. old kayle literally wouldve done the same amount of damage through autos that her ulti does currently, so take that for what its worth.