Yes it's good to have a a true ending and this finale provided one indeed.

I kinda like that Dollhouse doesn't shy away from the sexual side of the engagements. I think it's a good way to show that those people (the Dollhouse staff, the clients)are true predators, in spite of everything, despite all their good reasons and excuses, despite the fact that they aren't necessarily evil people–what they do is wrong. Also I think it's precisely the point of the show, the dolls were vulnerable women and men who didn't fully understand what they got themselves into when they signed up, who didn't want to see the reality, the slavery that would ensue, because they were running into some sort of fantasy escape.

I like how Joss explores human weaknesses here, and the writing can be brilliant.