George Farmer said:
This is your best yet, Sam. It's very nice.
You can obviously grow plants very well, but with regards the aquascape, you can do better...
The sag looks very nice and healthy but, for me, it's looks too monotonous and large, along the entire foreground.
If you replaced it, especially around the front of the wood, with something more interesting, I think that would work better.
Think about transistions to the midground and background. Rocks can help to hide intentions too, especially around the wood base.
Mixing more plant species can work very well. Slower growing crypts, anubias and downoi etc. will give the 'scape more sustainability I'm sure you can blag plenty from TGB if budget is an issue?
With a little more work I would strongly consider entering this into the ADA and/or AGA.