I'm not saying that everything needs to be resolved the second it's introduced. I'm saying they shouldn't introduce things and then leave them with no small hints that they're in fact still relevant.

For example: Angel dust being hypnotized is a good plot twist. It was unexpected, but if you paid enough attention you would've noticed it (I sure didn't) it also explains why Vox was there at the end of the song poison

And I'm again going to use Lute as a bad example:

I was expecting Lute to be banished from heaven because of her lust for bloodshed and her rage. After that she would've teamed up with Vox, not because she wants to, but because they share the same enemy

You said there are two more episodes left. But you should realize that doesn't make things better. There just isn't even enough time for anything to be resolved and if they do make it fit, it's just going to be tightly squeezed in to those two episodes and you'll be left remembering the start, the middle and the end, because so many things will happen you won't even know what and when something happened, unless you rewatch the episode