Yup, change is hard. But things evolve, even software. When the new ACR popped up, the rage against it was pretty impressive. However, as people have gotten used to it, the rage has tempered down to the folks like you who've just walked into the "new ACR."
Just be patient, you will grow to like it.
Let me try to point out a few things:
First, the image count is found in the Content pannel, bottom left:
As long as I have this image up. Sometimes people see their thumbnails but not the name, etc. of those thumbnails. That can be changed here. Also, if you just want to tap a # to give a rating or label, you can change that here as well.
I'm not sure I understand when you say "no indication of progress." What progress?
If you want to go back to CS6, you will need to get an old computer, an old OS, and you'll be good.
Meanwhile, I STRONGLY suggest you continue to work with it and stop trying to drive a stick shift in an automatic. I'm not trying to be rude but you want it to work like it used to. It is not going to happen. But, if you give this some time and a chance, it will be just fine, and probably better.