I'll go the other direction: It's just right as is. More rock, more hard to reach places for water flow, more detritus, more algae you can't reach with the mag float. Tank chemistry tends to balance out with little or lots of rock, depending on how attentive you are to conditions and upkeep.
Plus, I like the look of it- your rockscape has a nice "composition," giving an appearance of more space, which is hard to achieve.