Would you like the freedom to change your vote more frequently, or anytime?

That isn’t practical. It would turn the results of every election upside down many times over, and no final result could ever be had.

Yes, but @kritipers right.
Also theres no guarantee anyone would run against them as all campaigns take money, which means advance planning, etc..
Too complicated changing all the rules.

No. This isn’t a game. You get one vote – use it wisely.