With the exception of GST week, the guild spar rooms are somewhat empty and GS mainly consists of 2 "pros" vs 5 "noobs" matches with random people being free recs. As someone that enjoys GS, but is not into the guild life I find myself being the free rec often.
My suggestion is that they make a new room for team spar where people that want to GS can enter the que and get placed on a random team similar to CTF. I rarely see any "spar guilds" actually using the GS rooms, and its mainly individual players waiting to be recruited. This offers anyone without a "guild to spar with" an opportunity to GS without asking to be recruited. This is just so GS is easier for people to enjoy between GST's.