Excellent point about cognative load. Each vote must be relatively unimportant and 1/5 of a day's allocated voting power too much. I intuitively understood this in disliking one aspect of the proposal but I hadn't yet put it into those terms.
Specifically, I current vote on comments at 1%, which at 1/2000th or so of a day's voting power was too low to matter, even with a lot of comment votes. I put zero thought into it beyond liking the comment. The 1% votes are enough to award 30-40c and start to build a payout on the comment. With this proposal I will have to think very carefully because I don't want those comment votes (which are entirely altruistic/social) to burn too much of my valuable voting power.
Thank you for the insight.