Given the lower maintenance of the Hair grass, I'd suggest some nice bushy Crypts or Starougyne 049 Tropica in place of that ratty looking Gloss(?) in the midground, this would be easy to keep up on and look nice against the hair grass, and the background plants.
Gloss can work, but it's more work than it's worth for this layout.
I'd chose a more appropriate plant for around the rocks.
Otherwise the tank looks very nice.
Regards,
Tom Barr