While I don't mind that Angel is back I am a bit uncertain about this plot twist in general. It makes the concept of "death" a bit less irreversible. Many of the deaths in this show are great emotional moments and some of the dead remain that way but it gets a bit cheapened when you know that everyone can be brought back if the writers want it badly enough.But still, I am glad that Angel is back because his return will make this season a lot more interesting.
But the writer always having a plan is what makes the difference to me.