Looks like everything is coming along nice!
@Pikez can give better advice than me but I'll give it a shot:
Needs a more powerful street running front to back, and more variation in the height of plant groups,
Put reds in front of greens to stand out better.
The cluster of browns and brownish red species in the middle sorta all runs together. Separate those with better contrasting species.
The bright red on the far left is essentially a focal point, or it will be when it gets much bigger. Need to move that in closer to the rule of thirds somewhere.
Use brights or greens in the corners, especially in front. Dark plants in the corners visually "shrink" the tank, brights "expand" it.
And really there are too many species overall. If the goal is a true Dutch. you need less species and bigger groups.
But unless you have a second grow out tank to keep stuff in, a certain degree of collectoritis is to be expected... just have to make the best of it.