With the larger than necessary pump you're just using more electricity than you need however for the cost of a new pump it probably isn't worth it at this time to change. Depends on new pump cost, if you can sell the old one, electric rates, run times. The pressure seems right in range, not too high, so you're not driving the heck out of the filter. Relax, enjoy the 90 deg heat, and send some up my way. I may be in the pool by July at this rate.
Al