That doesn't sound like a major problem. Most areas have a notable enough skill gap where mid level players reach a certain point in loser's bracket and know they won't make it past their next match if they win the round they are on.
The most important thing imo, is that when you reach the final pool, you pay out all or almost all of the placings. That way even if 1st and 2nd are decided, its still important to play it out for 3rd, 4th, 5th, 6th.
Of course you can always do that with a bracket, like at MLG, but pools are alot better because you won't wind up at 5th or 7th just because you lost to 1st and 2nd early due to biased seeding.
The most important thing imo, is that when you reach the final pool, you pay out all or almost all of the placings. That way even if 1st and 2nd are decided, its still important to play it out for 3rd, 4th, 5th, 6th.
Of course you can always do that with a bracket, like at MLG, but pools are alot better because you won't wind up at 5th or 7th just because you lost to 1st and 2nd early due to biased seeding.