I do think that that implication is tempered (though not removed) by the fact that Darla really is a pretty horrible monster, and knows it.

This is true. But Angel knows this about himself as well and he doesn't have to stick a stake through his chest...

I dunno, I think Seasons 2 and 3 of Angel are really, really strong, so I wouldn't really want any part of them to go because that would pull apart the whole thing. But I wish there could have been more Darla. (And more Lilah, if we want to get on that subject... ;) )