I don't like Irelia as she is strong but is the change a bit too drastic?
Irelia Ionian Fervor (Passive) [Removed] No longer deals bonus damage to shields at max stacks
Vanguard's Edge (R) wall damage increased from 75/125/175 to 125/200/275 slow potency increased from 60% to 90% wall duration lowered from 2.5/3/3.5 to 2.5 at all levels [Removed] No longer disarms enemies passing through the wall
She was loved because she is unique but they basically remove whatever was unique on Irelia. I don't like Irelia but I'm sure this isn't the right way to change her.

Whimsy’s in Purple
, there was really no other reason something so powerful was on her kit. And it’s still an AOE Slow zone with high base damage that can still slow a second time PLUS resets her bladesurge.