How good is Captain Han Solo?

He's very good. I used him in arena for a long time, and still do depending on opponent - his daze on basic will neuter CLS/Han/chaze, and his cleanse/heal/+TM gain pairs very well with thrawn, and is very effective against MT and her plague. He's also an absolute all-star in TB. Daze is about the most important debuff,n and he doles it out like candy on Halloween (which can't be resisted on empire toons, and he does double damage on empire toons).

Basically he's amazing.