Lag is one of the biggest problems in a clanmatch or to the clan state , SR can't be with a lagger state by the others.
There is a lot of problems:
-> Lag
-> Unbalanced with Stayla (all the members should be balanced for be good in matches and for the clan be better by the time pass)
-> We didn't know him before he app , so we don't know if he is respectful , friendly , if he cheats or no , if he lags all the time , etc.
-> And because all don't know him , there is another reason: I've never seen him in hi-skill server , and i play a lot there.
So F2 for me , sorry.
But keep training and trying another clans from your level !