Yeah, I'm mixed on it. On one hand, new Lucifer, sounds great. One ep seems to be an alternate universe "what if" thing too, which should be fun.
On the other hand, they didn't specify that this was episode 1 and 2, it could be episode 12 and 18 or something and be totally disjointed. Plus, the finale was sort of a nice place, so opening it up again, with what will probably be inconclusive endings, eh.