In every pre draft ppr WR rankings, I've seen Nelson above Cobb. I'm curious as to why you guys have them slotted as you do? IMO, Cobb was heading for a monster season last year before his freak injury and believe he will be a top 10 option this year.
I can't speak for the other guys as those are my tiers. For me though it's because Nelson has shown he can have an elite season. Nelson is "safer" if that makes sense. In reality the difference between WR7 (Nelson) and WR11 (Cobb) is fairly negligible. For me it's just that safeness aspect. The guys in tier 3 have more question marks for me than the guys in tier 2.
I would not argue with you if you took Cobb before Nelson. It's that close.