Well, I have like 3 different SLKR counters available (some share some toons), so I don`t have problems in GAC with it. And roster depth for example in div 2 is completely irrelevant, since you need at least 14 teams and then you are left with g10 toons..the same goes for early div 1 (my case). Also there are only few top tier teams that can counter DRM and better teams, that having, I dont know, say, relic jawas, will not help you at all..
Another think I want to point out is, that roster depth is not considered in the matchmaking process..