Is there a benefit or detriment in draining excess water from rain by backwashing vs pump to waste? Is it possible to backwash too much?

This is one of those times when I thought the grass was greener on the other side. For the past 3 years I had 3 leaky liners and was complaining. I replaced and upgraded everything except the wall ans uprights. It is water tight. Now I wish I had that "self draining" liner.

Brian