As for a 12 man vs a 12 man though it comes down to team work and player skills. Lets face it some units are better than others and when it comes to that you will have another balancing issue that can not be as easily solved. Yes you could do a PSR match maker, but then you have the issue of waiting forever for your big group to get paired against another big group with a similar PSR. On top of that you have to then fill gaps of those big groups that are not 12 mans with skittles usually or small groups which then skews balancing even more.
So the easiest way to make balanced matches in Faction Warfare in my opinion is to either get rid of big groups or have only 12 mans. The issue with having only 12 mans is then you are limiting the number of people or units that can even field a 12 man on a regular bases to fill the bucket of Faction Warfare for even these groups to get matches. So in other words you wouldn't have a number of buckets issue, but instead an issue of limiting what can fill that bucket. On the other hand of limiting group sizes to 4 you do not run into this issue. The only issue you have is people being angry because they do not get to play with all their friends at the same time. What you do not have is an issue with Faction Warfare though. You do not run into a buckets issue, you do not run into a limiting of what can fill that bucket because every unit that could make up a 12 man can still make up three 4 mans instead, and it actually will help with balancing Faction Warfare or better allowing for a match maker if it is required.
Edited by Clownwarlord, 03 February 2017 - 06:09 PM.