I have Kylo at 7* and max gear since yesterday, along with 7* Sid and Phasma. He is very solid, tanky, his counterattack isn't bad, he works nice vs glass cannons (and very well vs Dooku, even if he counterattack it doesn't hurt that much, and you can use it to drop him below 50% faster which makes him reaaaally dangerous and quite scary, his cooldown refresh is awesome, think that below 50% he is still around 6k life which is still good and hits like a truck). He is not game changer, he is not op, but very good. Autoattack is OK. Yet until I got him till 5 or 6* I was thinking the same, that he was under performing. Now he is not ^^