Can we please not get all armchair programmer on an idea suggestion? It completely ignores the actual idea.
I do not see how this would effect end game whatsoever? You can only change your latest circle, and if you do you must re-level it from 1 (presumably without cards).
It’s not exactly an easy choice to make.
Also…my idea completely disallows resetting your rank 3 if you’re rank 6 or whatever so I’m not sure what you’re on about.
What if we limit it only to circles before the final available circle? Again, please read the OP before displaying in your response that you didn’t again.