Bengals were in a multiple WR set for the entire second half and were controlling the clock until the late explosion by Pittsburgh. He was all over the field (as he's been throughout the season) in the nickel and benefited from the Steeler gameplan to frequent blitz both ILB and drop at least one lineman and OLB in coverage because Cincinnati C Eric Ghiaciuc sucks, the RBs can't pickup blitzes and Fitzpatrick constantly looks to run when the pocket collapses outside. Timmons could have had five sacks if Fitzpatrick had run into him a little more often. Witness also Farrior's best game of the season.
Foote's been playing well, so this may still be just a one week blip in the radar. He looks like a real player, though.
At this point he's really only a useful option if you expect the Steelers' opponent to be passing a lot (especially in 3+ WR sets), something I wouldn't have expected the Giants to be doing much of. Even if you see a favorable matchup for Timmons I still don't think he's any more than a desperation start.