The First 2 RC's, were 4v4 tournaments and there were many slowdowns and desynchs.
This led to the tourny changing to 3v3 format.
The "Problem" with the 12 team format being held in 3 days..
is that there are long days required to complete the 3 matches on the opening weekend.
And many players complained (And, I totally agree) that it is hard to either:
Play 3 matches at competition level, and not get fatigued, or
to find the time across 24 time zones to allow for a '3 match a day' format.
The tourny would run very late in the East Europe time zones.