Johnson will move from WR to QB. It will give Silsbee a little more versatility at the position. Dual threat.
Silsbee will need someone to take a step forward as RB. Got two or three that will play but needs one of them to be the "man" on a consistent basis. A couple got some experience last year. Need to improve on taking care of the ball.
WR core will be just fine. Probably doesn't have a game breaker within the core, but solid group.
As mentioned above, Silsbee's offensive strength will definitely be their O-line. Will be the best in the district and one of the best in the region.