Nice progression. You might be losing out on a lot of extra wall space though with your figures pinned to the wall in bags and quite luxuriously spaced out like that. You could probably get a nice wall mounted cabinet that would free up at least half that wall (more room for MOC maybe or a few shelves?)
Thanks for the replies , that's a good idea Joe, I'll have a look see what I can find. I think I might be able to squeeze another set of the black shelving units in too.
I think it would work pretty well in the space you have! A detolf would also fit and look nice with some risers for your loose figures but you might be best with something on the wall that gives you a bit more floor space in the cave!