I don't know how good gR are individually tbh, but I do know that will is a great guy, and if I personally ever had to team with Seven, i'd go insane with rage. Just from listening to two games I get the feeling he just moans and bitches all the time.
He could be an amazing player for all I know, but I hate to be on a team with someone who literally give me a headache from just listening to him.