Ok, I stared longer so let me elaborate on the hierarchy. I do see one in your scape, the eye bounces first from the large red stem to the pink, then the grass draws the eye down to the crypts. That works, but I think other elements could be stronger rather than the reds dominating the eye, and I think some more depth could be created with midground plants and tighter pruning.
My sig pic is the first real time I started to put a hierarchy in a tank, it isn't as effective as I'd hoped, but here's how it was intended to go. The sand beach and "hollow log" (main focal points) grab the eye, the right side greenery draws the eye up into a counter clockwise direction, the light pink plant turns the eye left and across the top of the tank where the red brings you back down and back into the sand beach with the help of the left side greens. The hierarchy was intended to be a counter clockwise circle, although I think there are many things I could do to accentuate it that I just don't realize. All you can do then is add new plants, figure them out and move things around until you see something happen. Yours is a V, or I think some call it a U, but yours is a very tight U. Whatever you want to call it, it's probably a good thing in a bowfront, because as you try to add more midground, the sides are going to fill up quick and get darkened. The shadows there will still help accentuate a V or U down to a central focal. Or you could do a heavy rescape and create a strong central focal point, say a tall cluster of manzanita and stem plants, with the two sides being bare, maybe beaches or carpets. That would work well with the tank shape, especially in person. Not sure what they're calling that, but I like tanks like that also.
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