with limitations like removing the ability to do this while there are any active bets, or after a certain number of frames & only once (to remove people's ability to stall a server indefnitely) i don't actually see much problem with it. it'd definitely be helpful.
the only way i see this benefiting rigging is by possibly making it easier to coordinate what rig they're doing?? but that's already a thing before a match, so.. idk. i don't really see it.
new players aren't dueling or anything - if something's unclear, they'll do it once in a beginner server or anything, their opponent will get 10tc, and they'll never be tricked into it again. if there's a message like "[opponent] has requested to reset the match."
i'm really curious to hear what specific abuses are possible, because i'm not really seeing much besides stuff that can easily be fixed (see my first sentence)