If a candidate wants to change name to distant himself/herselfdistance themself from some of his/hertheir actions in the past, why do you think he'll/she'llthey'll do it during the election, not before it? As your proposal simply won't work if he/shethe candidate renames himself/herselfthemself before election, I suppose there is no sense in implementing it.
Just look and revert manually. Renaming for non-moderators is limited by one time per month as I rememberrecall.