Personally, I think the curve of influence that SP gets you is way out of skew. Whales are incentivised way too much, while minnows don't see that the little steem they've invested is getting them any vote power at all. It also discourages open debate and discussion when one person can downvote to offset probably 10,000 minnow votes.. (obviously I'm just throwing up numbers but I think you get my drift)