He clearly possesses the athletic ability I'm sure QB Jeff Garcia needs in order to remain on his two feet after releasing a pass. He's also a young guy who can challenge starting TE Alex Smith and also become more of a running mate with Smith as opposed to a mentoring type.
Troupe's production has slipped the past two years, but I think that can be attributed to a young Quarterback coming in trying to learn the system. He progressed from his Rookie Season to his second season while playing with Veteran QB Steve McNair. It'll be interesting to see how he and Alex Smith help QB Jeff Garcia out this season.