Yeah, the meta was really limited in that tourney. Of the 7 games I played, 13/14 times monowater, the strongest deck, was used. (my opponents did it 7 times and I did it 6, using monofire once to try and be different :p) The idea behind it was great, though. The biggest problem is that like 95% of the cards that were legal were creatures, so it meant that the one element that could actually do something about creatures (yesterday, water) was the strongest. The next strongest, fire, was such because it had the best creatures remaining. I think probably every single player built the 6 dragon 6 seraph 18 quanta deck and the 6 icebolt 6 dragon x dry spell deck.
If this idea is done again, something should be tweaked in the rules so that a mix of creatures, spells, and permanents are available. Those few that were available this time were almost all unusable competitively in the meta, aside from water.