I like it, the way the plants are all together towards the left rear corner has a nice effect, like a flowerbed almost.
if you leave the plants as they are you could add driftwood as a focal point towards the right-front or anywhere depending on the shape of the wood.
I suppose my one suggestion might be to re-plant the reddish plant that is getting lost behind the other plants, only because it is so pretty and contrasts nicely with the greens. Maybe it is the tallest growing and it belongs in the back, so it depends.
I just added the plant you have on the right side of the bunch, not wisteria but the other one that looks like thyme almost.
WHAT IS IT CALLED? My
lfs guy forgot the name when I bought it.

thanks!!