Update 1 month in and I have some questions

My LFS did the move, but i don't know if I am completely happy with the rock work. They just set it in there on the sand without any kind of glue or epoxy and the pistol shrimp that came with the tank, of course, has dug under all the rocks and they have shifted. Now that my clean up crew has gotten ride of 80% of the hair algae and aptasia that was overgrown, I can get a good look at the rocks and can see other encrusting corals that look like they may want to be happy and come out. i also would like to move some large and med mushrooms and possibly a tree type coral that I don't see that they are on a Frag. Other corals that i have put in are on a frag and I can move those easy enough. I just would like to re-arrange the rocks and get them deeper in the sand and also connect them together with some epoxy to hold the structure better.
My questions are...
1. I have a rock that has a large ricordia mushroom on the front and a couple small ones that I can now see at the lower back that is sandwiched between the rock and the overflow. How easy would it be to detach the smaller ones and relocate?? ( pictures with arrows )
2. I also have a purple tree that looks like it has a good footing on the rock, maybe it was smaller and has grown over the frag, idk, but I may want to move this one. I just looks like it could be happier. If I can identify it, i can look up the care and move it to where it may be happier.
3. On some of the encrusting corals that have tiny polyps looking like they want to come out, but it was once overgrown with algae. Can the remaining algae be cleaned off with a soft toothbrush carefully ? Maybe they would be happier with a clean surface to live in ? ( picture with drawn circle )
4. I also have some GSA and some type of Zoa that looks like it wants to come out, little tiny polyps peak out ever now and again, but not the whole colony. Can the algae be cleaned off of them ? ( last picture with drawn circle )
So far I am pretty happy with the results so far in a months time. So many new things pop up as the CUC gets everything cleaned up better and water parameters are consistent.
