So, let's work this from the bottom up.
Things that help get WR's more Yac.
1. Play design- Play design has everything to do with Yac, If your running routs in layers and the throws are meant to be in the first or second layer... then DB's will catch you.
2. Ball Positioning- Another huge part, while I see JA putting it right there, I also see WR's having to reach at weird angles.
3. Offensive Line. You all know how much of a rush JA has had to get that ball out at times. 5 plays he has all day, then the next 5 times they on him in 1.5 seconds.
4. WR Speed. There has to be a reason why we got a dude named smoke.
5. WR Rout Running skill/quickness. I think Diggs is a top 3 WR in this league. THAT BEING SAID!!! <(my fav. saying ) he is nor ever be a big yak running WR.
6. The Running Game. This is getting better BUT, if teams do not have respect for your running game 7 DB's/LBS will be floating all over the place. This obviously is getting better.