The trouble with Irelia: You can't buff her. Why? Too much crap in her kit.
Life-on-hit, stun, slow, wave-clear, gap-closer with reset, multi-type damage with true damage on-hit, durability, CC resistance...
You name it, Irelia probably has it for a fighter. And all in sucky qualities.
Something in that probably needs to be removed, or Morello will keep nerfing her (even if he hasn't in a long while). Additionally, it means that if left in her current state, she cannot be adjusted for balance because any change will either make her instantly OP or UP.
If you had to take something out, what would it be? And don't say "Nothing", because that defeats the purpose of this topic.
I'd first remove the stun on her E, because it punishes you for outplaying her. You get ahead in health, she stuns you and you can't counterplay that stun.