Right now all that is in my tank is a rope fish and some small dwarf cichlids so being pretty heavily planted is no real issue. However, if I can ever manage to re-home my cichlids, I would go back to Panda Garras and would do some thinning of plants to give the beasties more room as they are extremely active.
Really, as indicated above, it depends on the fish and how active they are. For instance my rope fish loves a lot of plants as he is pretty sedate and likes to casually swim around the stems. With Panda Garra it is different as they are very fast and really only want two things in their way; other Pandas to play tag with and air bubbles to play with. If I can ever get my Pandas I will rearrange plants to keep a 'forest' for the rope in the back of the tank leaving the front half pretty bare except for some low plants.