I like Watson here. The Seahawks have been generous to TEs this season. Specifically, over the past three games. The Hawks have allowed an average of 5.3 receptions, 63 yards, and a total of two TDs over their previous three games to TEs.
Gates is not 100-percent and he will not see a full complement of snaps, so that decreases his value even more.
Stick with Watson, especially if you don't have to make any roster moves to play him. Gates will likely be your guy later in the season but i'd give him more than just one practice before naming him as your starter.
Looks like Gate will have red zone action. I rolling with Gates..
QB Romo & Cutler; RB: R Grant, R Mathews, F Jones, F Jackson. M Tolbert. & C Williams; WR/TE used as same: G Jennings, A Gates, M Austin, S Holmes, D Keller; Kicker: M Crosby. TD League-bonus-100 yds rushing, receiving, & 300 yard passing.