This would at least solve something.
How about direct ability to upvote for Steem rewards, but slow and gradual ability to participate in voting for witnesses?
Direct engagement (important for on-boarding new users), but slow changes in power structures (not really important for minnows/new users, but comforting for investors and very good for security of the chain)
Let's avoid breaking things.
RE: Reversing the power-down-delay to a power-up-delay.