I find COH completely lacking in gameplay. but that does not mean I don't love it and see its appeal.
COH does what no other game out there right now does. you can become POWERFUL. take on armies. and can do it in MANY DIFFERENT WAYS.
Not to mention a darn good character editor. not as good as CO's outside a few places where COH comes on top like power editing, but good enough.
If I want a real challenge, I dont look to COH becuase that is the last place one should expect to find it. I have FFXIV and raid savage raids there. that, and the occasional Ultimate prog satisfies the need for challenge. in COH the challenge is always in the RP when I am RPing them (my characters) facing desperate odds.