More pond = less grass to mow!
Pond looks beautiful. If there were more than 6 weeks of summer here in buffalo I'd love to do a pond.
A real easy "addition" ... grab a few more of those slate rocks that you're currently using for the borders, and stack them where you have the filter hoses running to the pond, and put the return line at the top of the stack so the water runs down over the rocks and into the pond. Hides the hoses and adds some movement.