Jennings won't be changing positions now. He is growing into a number 1 WR that needs more balls.
I agree with what Kippy Brown said though before that you need to build around defense and your best players being on defense. He could coach a bunch of no name WRs into winners but you needed dominant defense. We keep moving or best players to offense. A defense wth Jennings and Byrd last year in secondary probably would have been outstanding and then Preston ends up starting and fine with his playing time