I understand that line of thinking, but I think you're selling way too low on how good this team will be with Watson at QB.
The Browns should and probably will be favored in their first 4 games of the year. Carolina, Atlanta, NYJ and Pittsburgh all have worse QB situations. The Browns played the hell out of the Chargers last year, and getting a cross country 1pm game against them helps. I don't know what to expect from NE this year.
Point is, I could easily see this team at 4-2 through 6 weeks. They play 4 of the worst teams in the NFL, IMO. I know it's Pittsburgh and all, but right now it's looking like Mason Rudolph is going to be their opening day starter. The Jets have drafted decently, but Zack Wilson looks like worse Baker Mayfield, Carolina has ACTUAL Baker Mayfield, and Atlanta...well there is a reason Deshaun is here and not there.
Baltimore is, for sure, the team to beat in the AFCN. But it depends, Lamar has gotten dinged up a bit, and his passing game is still so so. Woods has devised great game plans for the Ravens last year, I would hope that would continue. Bengals are absolutely coming back down to earth, and Pittsburgh stinks.