The only OP champion in this list is Ezreal.
I was talking to Phreak yesterday and he explained that though Kog Maw is the strongest carry atm, that is actually the intent of Riot.
Kog Maw - Strongest carry, little CC, no escapes
Ashe - Medium strength, lots of CC
Tristana - Medium strength, moderate escape, long range
Ezreal - Weakest carry (after the next patch), strong escapes, long range (though this will make AD Ezreal completely useless imo)
I think Morg is a bit too strong for such a good support. I also feel that the other tanks need to be buffed to Amumu's status and not Amumu brought down.