Vayne is so broken, She is totally insane
But first, let me nerf 
But first, let me nerf 
irelia has never been nerfed, to my knowledge
I am just joking xD
I wasn't 
xD yeah I know, her kit has it all, dash, cc, mobility, tenacity, tankyness, magic damage, true damage, physical damage, poke, sustain, waveclear, but lets not nerf her ok? I actually would like to see her on the LCS, if she one day gets there she will be nerfed so hard.
irelia has never been nerfed, to my knowledge
She received chain nerfs after her release even tho she wasn't that OP and other champions that needed these nerfs were dominating 24/7
http://leagueoflegends.wikia.com/wiki/Irelia/Background
She's been nerfed. A long, long time ago. 5.6, 1.0.0.136, 1.0.0.121, 1.0.0.118b, 1.0.0.113.
However, Irelia's power level in the general sense is (or, probably better to say, used to be) tied tightly to the power level of Trinity Force. When Triforce was nerfed in the transition to season 3, Irelia was, as well. She was rather bad all throughout S3, and only the buffs to Triforce on the World's patch of S3 brought her back to the limelight. Since then, she's rather strong in solo queue (51-53% winrate, stable for years now), and has been a some staple pick in competitive, as well (her exact abundance depends on how the meta synergizes with her mid-game strengths, her weakness in lane swaps and other factors).
Well Vayne still broken no skill champ,but they aren't really going to deal with her now
Indeed. How good that is going to be fixed on 5.24 - it will now no longer stack the damage, but deal the highest one from both passives (Firecannon's on non-crit, Shiv's on IE crit.
To underline how ridiculous those two items are on Vayne currently, look at her average damage distribution: http://champion.gg/champion/Vayne
11% magic damage, on a champion that has no kit-intrinsic source of magic damage.
yeah implying irelia isnt broken :^)