Please take this as a friendly thought and not that I have any ill intent to be annoying, or disrespecting your tank.
If you set up DW and stones using the rule of 1/3rd's grid, the DW should be over towards center about an inch or 2cm or so, can't tell for sure the # of inches part, with the gap of the DW branches at the 1/3rd line then the center long stone needs a second stone behind it as it seems to look too much like a row/fence of stones,
Then maybe a way to get the right small stone to the right side 1/3rd lower line. Which might happen if you slide the whole thing over the 1 inch or so.
Then lastly, if you were to use the rule of 1/3rds lines on the bottom of the tank looking down from the top to the substrate - the whole bit might need to be closer to the front on the front 1/3rd line or to the back to the rear 1/3rd line.
Thats just my 1/3rd (not even 2 cents) cents about it. Recently reading about the grid thing and it does make the vision more pleasant to observe - natural in a completely staged way. Please do not think of this as critical, you make beautiful tank scapes. (I am hiding right now as I hit the post button.)