Okay... I'm gonna try to be sincere. As a Finale, I like it. It's an open one, but it's cool. What is the problem that got many people mad?
The fact that we got to wait 3 months for just 20 minutes of recap and 20 minutes of a new episode. I myself was just mad too by this. But, letting that aside, it a great end for the show that makes you want a Second Season.
I really think if they just didn't make us wait 3 months for this, everyone would have liked it. The revelations in this chapter were pretty nice and they resolve some things in the plot, but the things like fightint Frill or becoming and Eros Warrior aren't touched at all. And it's because of that that I think it should have a second season. So, please, if you watch it, try turning aside the fact that you have to wait 3 months and be more critical, because it isn't that bad. And if you didn't watched Wonder Egg Priority, watch it, it's very good.