Physical traits, speed, agility, explosiveness attributes of Top WRs (What's the formula?)

As Brees started to age they put a premium on CIT or catching in traffic.
Saints will sign a FA WR you can bet on it because they won't want to go into the draft with an obvious need at WR - They hate to be pigeon holed.

Leaving 1 spot to be filled by a drafted receiver(according to your data) and in a deep draft they likely won't go that direction in the 1st round - unless a WR is BPA. They'll be more likely to hit a thinner position early like LB or DB or even OT if all else fails.