So you're carrying no hitting bench at all? One util might help you out in H2H weeks, and should almost come out to having the same PT as other starters with days off and benching guys because of bad matchups (like Duncan against lefties). What does the FA list look like? A good pickup should be able to add at least 4 runs/rbis and maybe a HR/SB while not hurting your AVG. Fighting for a playoff spot, those little things can mean an extra win here and there and can make all the difference. Vargas would be the guy I'd drop to make room.
Otherwise the hitting lineup looks strong ... just lots of injuries and underperformances. Pitching looks good for a 12-team league, and keep your fingers crossed for Sheets to come back. RPs aren't so hot, but it's probably the best you can do at this point.
I think you have a good shot at making the playoffs. It's certainly a solid rounded team that looks better than many with better rankings. I like the trade you did ... you got something valuable while not hurting your lineup.
Look at mine please: viewtopic.php?t=310093