I can agree with all of these and these measures would be a significant step in helping to distribute influence more evenly amongst the block producers and decentralize some of the power that keeps the current list rather static.

Rather than reducing the number of votes to 10, I would prefer that one is allow to give partial votes (up to 1) based on their stake, with a limit on how many people a specific user is allowed to vote for (maybe 10, 15, 20?). That way you can give more influence to certain witnesses you like more than others and the witnesses sacrifice their own position in any attempt to collude with other witnesses to keep each other up high in the rankings.