We play 11X11 H2H and carry a 23 man roster with 2 DL spots. Some teams carry extra pitchers and some carry extra hitters. I have to say that we haven't really seen streaming except in the case where a team, mine was one of them, experienced a number of injuries and had to spot start appropriately to meet minimum weekly innings (30).
FWIW, our pitching cats are:
W, L, SV, HLD, CG, SHO, K, H, K/BB, ERA, WHIP
I've found that pitching is quite valuable in a H2H league. Play around with your categories and consider upping your weekly innings limit. It might do what you are trying to do.