Same! Ah, he's so great. Had me swooning a little. It's too bad Aloth didn't seem like quite the same character in the sequel, but Mercer is always fantastic.
That's, unfortunately, the problem all returning companions had I am afraid. Giving characters great, branching endings, and then trying to merge them back for the sequel can have this effect. Aloth is the most bland of the bunch though, especially if he doesn't have Iselmyr anymore.