Round Robin with Bo1 would be better than bracket pools IMO. Players pay a lot of money to get there, and enter the tournament, just to play someone like Nairo or whoever, and get directly to losers bracket. With RR Bo1 you get the same amount of matches, while still getting some people on/above/below your level, mostly, without being (nearly) eliminated by losing 1 set. But I guess, it's too late to change that by now. It could be 5 Stocks as well for example. That would probably be a good compromise overall. But even not, its still better IMO.
I wonder how big the time difference is between Bo1 RR with 10 people and a Bracket Pool Bo3 Matches with 10 people...
Lets try to calculate that. Lets say we have 32 TVs for Brawl. Therefore only 1 TV for every pool. Most Matches take approx. around 5 Minutes.
With 10 people RR, that would mean sum(1to9) Matches -> 45 Matches. If they all take 5 minutes, that would be 225 Minutes to complete one pool. Approx. ~4 Hours.
Now for the Double Elimination Bracket with 10 People, WF and LSF, LF, GF not being played out. But sets are Bo3.
A set would take ~15 Minutes. (Extra time for banning/counterpicking added, but most sets only end with 2 matches, without the third match). I used Pool 1 to count the total amount of matches: 14 Matches for that Bracket Pool. That means 14 * 15 Minutes = 210 Minutes. That's 3 1/2 hours.
So, seems like Bo1 RR would be almost the same, time wise. Maybe a poll would've been a good solution. Should probably be done for the next APEX if its too late now, which I guess, is the case.