Keep it! But ... maybe you could improve it a little? Add some smaller stones between the gaps? make it less straight? Maybe even plant some small plants or maybe use moss to make it look more over grown and wild?
Oh I like the changes, that's looking really good! It will look great with plants around it. I like the way it curves back behind the rock.
Maybe taper it from front to back to create an illusion of depth, possibly even use gradually smaller stones towards the back so it appears to be fading into the distance?
A good tip is to keep the substrate low at the front of the tank while sloping it up towards the back corners. Keep the sand flat and neatly level at the front if possible. The added height at the back will help to increase the perception of depth.