My guess is that the people who supported a new attack and most/all the elemental beams were the ones who voted for Levitate as the ability in the first place! When I was making my votes I personally didn't worry at all what the ratio of abilities used would be, but rather what the usage rate of Strategem at all would be once the initial hype died down. It was pointed out early on that mono-Rock is a terrible defensive typing: weak to five attack types, all reasonably common now (thanks, Bullet Punch), and the types that resist it are almost always paired up with an SE move, i.e. Airslash+Aura Sphere or Body Slash+Earthquake Snorlax. If it weren't for Levitate, it would have almost nothing that it could safely switch in against at all. I voted for Lev as an ability for that reason, and I considered anything Strategem got from the second ability a bonus. Even when it gets in, it has to actually sweep, which is pretty difficult for an all out special sweeper in gen 4, especially one so easily revenged by the ultra-common BP Scizor. Alakazam, Raikou, Porygon-Z, and even Azelf are struggling to do so currently, with Azelf getting most of its usage from Stealth Rock-Taunt-Explosion nowadays. Most special threats in OU have either really good defensive types to give them easy switchins and check common threats (i.e. Heatran, Zapdos) or are mixed attackers (i.e. Infernape); all-out special sweepers are pretty rare, but that's what we voted for, to break the mold on the traditionally defensive and physically-oriented Rock type, NOT to make it use a bunch of <=60 BP moves to try and make Technician look good. I voted for movepools with lots of elemental options because those were the ones that I felt gave Strategem the best chance to actually be a relevant OU sweeper, rather than languish unused near the OU/BL border or get play as a suicide lead exclusively. Evidently a majority of voters had similar sentiments, given how the movepool polls played out. What I had no interest in was creating some arbitrary level of "balance" between the two abilities by undercutting Strategem's capabilities as a whole, not when its viability at sweeping at all was uncertain in general.