steve, the way it is now, there are pools, but they are bracket pools. which is what chain ace said - two people will advance, one into loser's, one into winner's.
This is literally only one difference from being a single bracket: if you lose once in your "pool", you play another person that lost in your pool.
Well, just checked, it looks like if you seed everyone from highest to lowest, the single bracket and the bracket "pools" are identical.
(avg seed), each row is a pool, 64 players total
32.5 | 1 16 17 32 33 48 49 64
32.5 | 2 15 18 31 34 47 50 63
32.5 | 3 14 19 30 35 46 51 62
32.5 | 4 13 20 29 36 45 52 61
32.5 | 5 12 21 28 37 44 53 60
32.5 | 6 11 22 27 38 43 54 59
32.5 | 7 10 23 26 39 42 55 58
32.5 | 8 9 24 25 40 41 56 57
Lets look at the first pool:
<1,64> <16,49> <17,48> <32,33>
lets assume the higer seed wins.
then the first round of losers is
<64,33>, <48,49>, which is exactly what you would see in a normal seeded pool. Same with winners.