I was trying to play with a flying-based Rakano list, and every game stalled out with them under 10, but with absolutely no chance of pushing the last bit through. I see people saying it's a good matchup, but I just don't see how.
I hear you on the mulligans, though I still think it's a better system than Magic. It feels good to have the option to go down again if the redraw sucks, but the guaranteed mana in Eternal does a lot more to reduce non-games than going down to 5 or 4 cards, I think. Doesn't make the runs of 4 or 5 games stalled at 2 or flooding feel any better though.