Two suggestions. #1 - practice effectively by making it a routine. Combine your practice with something else - that is, you always practice piano the minute you complete your morning email review. Or some such thing that you do every day. The effective part of the practice, actually comes from following and understanding your assignment, and communicating with your teacher to be certain you are progressing.
#2 - You can follow a degree program for Music Theory, or any number of music disciplines, not all of them requiring piano performance degree work. Perhaps your interest lies in that area. If so, discuss it with your teacher. Maybe you could be assigned fewer, or easier pieces, but explore theory in greater detail. Perhaps theory could include greater use of piano exercises for the purposes of exploring the theory aspect of it. Scale structures, chord development, etc., etc.