This question already has an answer here:
Moderators currently have access to a nifty list of all a user's comments (500 at a time), which now includes a summary of flags on those comments. Unfortunately, we still have to visit the post where the comment was made before we can do anything about those comments, even if there is a pending flag.
The two-step process makes sense when we're trying to figure out if, say, a comment is obsolete; we need the context. It doesn't make sense if, for example, we're just trying to delete the user's 60 comments that all say something like, "You people suck," or "This isn't a homework site. Go RTFM." It's pretty safe to nuke those on sight. After all, moderators are, by definition, trusted users. We should trust them to be able to figure out when to do more investigation and when to nuke from orbit.
I propose fixing this by giving ♦︎ moderators the ability to edit or delete comments directly from the last-500-comments list. As far as I can tell, this was last proposed back in 2012, but never got any traction. I think it's time.