How anyone can think that allowing multiple regimental teams to compete in RGL is a good thing, I will never know.
Regiments that stockpile players should not be rewarded for their efforts, if this were to be allowed, it's not too unrealistic to see the future tournaments being a league 1 of 10 teams, and league 2 being their 10 B teams. If this were to be allowed, it would cause significant damage to smaller competitive regiments, whom survive on the recruits they gain when tournaments such as RGL come around, when players from centre companies such as the 92nds and 45thns, who haven't a chance in hell of ever playing for these regiments, leave and seek a competitive starting place elsewhere. Part of what keeps nw fresh is the ever-changing landscape of regiments, leaders and tournaments that we all take part in, to put that at risk so that regiments like the 45thn and 92nd can continue to suck up members, and keep them around with the promise of a starting place in one of their rgl line ups, is a joke to be totally honest.
Allowing B teams would also present a balancing problem since both the 92nd and 45thns centre companies are far better than the teams they would be playing in league 2. Providing that this isn't the last RGL (it won't be) what do we do when the 45thn or 92nd centre crush league 2, promote them? And if you are going to make an argument for allowing regiments to play 2 teams, why stop there? The 45thn, according to its roster has almost 400 people playing for it (including reservists). Why not argue for 10 45thn teams?
Finally, there are two leagues of 10 regiments without B teams even being a part of this RGL. There is enough interest from regiments wishing to play RGL to not even need to consider allowing b teams.