I find this proposal (read it and voted on Github too) the right thing to do. Even more, the ideas to make this page more user-friendly are most welcomed, since I know people that have been on Steemit for as long as I have and don't know what witnesses are, or voted for one yet.
Maybe a reminder to vote for witnesses in case one still has available slots (or maybe only if he/she hasn't voted at all?) should also be included in a visible place.