I don't have a single match-up that I would say I like fighting him in mid lane. I can tolerate him in most match-ups, but I still ban him pretty often because he's one of those champions that even if you win lane against, or out-farm him or whatever... he just buys a cheap item and suddenly he's untouchable.
I've been playing Illaoi top lane a lot recently, though, and can't say I care about him up there. He can only block my E, but it's not very broadcast and it's pretty easy to get around since he can't just dive me through it since I can still damage him with everything else. And I have more than one viable armor option as Illaoi, whereas as a mid mage I can only go Zhonya's.
Which actually might be the bigger problem with Yasuo or Zed in the mid lane. Mages just don't have options to deal with them. They have one choice.