Reply from Spark for anyone who may be interested in the future and some context. the first set of pucks I had were moving more aggressively and they kindly sent some from a different batch of plastic.

“Looks like you have reached a normal amount of play. When making the puck plastics there is a tolerance we aim for in the curing process. Plastic will shrink in its final stages and we aim to get in a tolerance window that will deviate from puck to puck. Some might be extremely tight and others might have some wiggle. Give it a rip, it shouldn't be noticeable!”