Firstly, I think Watson was going a little too high when his hype reached its apex at the end of the summer.
That being said, I wouldn't worry about him. He hasn't scored yet, but the New England passing offense hasn't been that good yet. It's not like Brady is throwing up 300+ games and Watson isn't getting a piece - the Patriots have been very focused on the run through two weeks playing against two crappy teams.
Also, if you watched the Pats/Jets game last week, you would've seen a play in which Watson got wide open in the end zone and Brady lofted it to him, he was WIDE OPEN, and Kerry Rhodes jumped up out of nowhere and batted the ball down (great player). Brady later admitted that he underthrew the ball just a bit, otherwise Watson would've had his first TD of the season.
So, I mean, if Watson had caught that TD, you wouldn't even consider dropping him. I think that's saying something - so hold on to him, and wait to be rewarded.
You can go ahead and drop troupe though.