Steemit is in beta. It should be. There are those (obvious from the financial manipulations ongoing) that just want to maximize short term profits, and I think they are pushing hard to open the floodgates to massive adoption.
I don't think those parties so pushing for short term profits care a fig for the long term success of Steemit, or anything other than their quarterly returns, and this is a threat to Steemit in the long term.
This is why I strongly believe Steemit should first ensure that it's present userbase is widely satisfied (per capita, not per SP) with Steemit's rewards mechanism before opening those floodgates. I care not a fig for my quarterly profits, but do care very much that Steemit succeed in the long term.
There are a lot of things that are attempts to mitigate the weighting of VP by SP, and the slider is one of them. As @baah just replied in another conversation I am having "as long as curation of content is for profit, manipulation of curation for profit will happen", and mitigation cannot succeed.