Why remove Irelia's unique strengths?

Irelia - Ionian Fervor (Passive) [Removed] No longer deals bonus damage to shields at max stacks - Vanguard's Edge (R) [Removed] No longer disarms enemies passing through the wall Removing Irelia's unique strengths that help define her niche as being a strong answer to marksmen+enchanters and then.. Vanguard's Edge (R) wall damage increased from 75/125/175 to 125/200/275 slow potency increased from 60% to 90% ...increasing her generic strengths which are arguably the more annoying across the board unless you're one of the 2 above who she's meant to counter these aren't good changes. the opposite should have happened
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