I don't see any potential benefit to removing Species Clause. At best, it will make the testing process longer and more confusing (and the banlist larger). At worst, we'll find out that nobody actually likes being swept by two or more of anything, and as much as "we should all let go of the outdated 1st-3rd gen 'counter mentality,'" we'll never reach a metagame that the community considers "desirable" by actively making clear-cut counters and stable strategies useless.
"Variety" is the only good thing I can see coming out of this, but I seriously doubt that anybody will notice or even care about the increased variety brought about by a lack of Species Clause. Who cares about being able to use Blaziken twice when Salamence/Lucario/whatever have to be banned to do it? Does anyone actually care about "that" type of variety in the first place?
As for Sleep Clause, I think we could easily sustain a balanced metagame without it by just banning anything that's too broken with sleep moves. Putting it up to a poll sounds like a good idea to me.
Analyzing battle data for luck factors...