Although I like both ideas. Both of them have flaws and thus are not good to be implemented. Some variation of them could work, but should be carefully considered. Personally, I believe that post promoting and SP transfers are just what we needed.
First one, imagine whale on supercharge vote.
Second, if we could reset voting power all the bots that are curating for profit could power up and have their voting power reset, thus would earn even more curation rewards making manual curators, even more, usseles.
RE: 2 Killer Steemit Features I Would Like to See