I think most people are voting he's fine so as to not awaken the nerf-herders and people just like Kenobi or possibly because of how he has to be unlocked, but if he isn't OP than no one is. He's not even a widely distributed toon like DN is, yet he's up to 71% usage on #1 teams compared to 77% for DN. His team crit immunity on a passive skill alone shuts down large chunks of the roster that depend on crits. Taunters have always been meta in SWGoH and he does it passively, better than anyone else in the game. There's NO lead in the game that even gives 100% retribution and only 1 toon (Dooku) that has 100% retribution, yet Kenobi can give that to the entire team no matter the faction. Cleanse is also a key meta skill and he does that as well for the entire team, all factions included. Throw in more passive foresight spam that wastes enemy turns - that's a LOT of team aid :)
Oh and on his own offense, he has the full team assist that often can OHKO a specific toon.
So with just one character defensively you get:
1. Team crit immunity (wow all by itself)
2. Spam taunt protection (again, great by itself)
3. Team cleanse all factions (great by itself)
4. Self and team foresight generation (100% evasion is elite)
Offensively you get:
1. Full team assist regardless of faction (Most or all other characters only can get full team assist from a specific faction - so yes, this is elite and unique) - you also look at the less damage - it's just 30% less damage. When Veers calls troopers it's 40% less damage. When Cody calls clones it's 40% less damage. So yes, that's pretty OP in that he not only calls all factions to assist, unlike Cody or Veers, but he also does MORE damage across those factions :)
2. 100% retribution chance up on entire team, regardless of faction. Again, there's no leader skill that does this, they don't make mods that let you have 100% retribution, and there's only 1 here at all in the game with 100% counter chance (dooku).
That's one insanely overpowered kit relative to anything else.