Geo
You kind of have the same problem as me, you want to change things up, I bet your bored a bit now eh? This stage sucks.
I think the only thing really you can do is add more plants, but with all that surface coverage this is going to limit the effect. You like I, want the coverage for the fish, and like I, presume you want cover so as to limit that dreaded brush algae that covers
Anubias and
Java Fern.
I know you won't do it, as it means exposing the fish but If it where up to me... I would look into maybe getting rid of the floating plants, and going Co2 injected and plush that bad boy up with some nice bushy fast growers, some different colour too reds and such. work on a true carpet, etc. Not a "true" planted tank but a hybrid. semi high tech. this requires light though, otherwise it won't work... so its a catch 22 situ. I would go this route, but my little 29g is too heavily stocked and adding the Co2 would scare the life out of me, I could imagine coming down in the morning to find the fish all dead...
or you could try finding a ton of sumatra drift wood, and building a big tangle of it over one side, and have a load of
Java Fern interweaved throughout it.
heres a few pics I stole of google, some are better than others. what I am getting at is maybe down one end have some kind of high tangle of thin twisty sumatra wood, with all kinds of
Anubias, fern and moss attached. this would give some height and depth in the corner. then up the other end maybe just densely planted bushy fast growers, a ton of
Anacharis as mentioned, or even cabomba maybe, some nice red plants in the mix too. you could perhaps keep the spray bar positioned so as to keep the surface clear here for more light penetration. then have an area in the middle that thins out, and have your carpeting plants. maybe something different to pigmy chain. a few small bits of driftwood maybe. anyhoo, heres the pics...
P.s the last pic is like my dream... how amazing would that be??