Just think about it.
Sammy Watkins - We know what Sammy Watkins means.
Robert Woods - A HEALTHY Robert Woods working out of the slot with these players around him is a viable threat anyway you look at it.
Charles Clay - Clay is not Gronk, but Clay is going to give us more in the future if Tyrod grows. Clay can and will be better for us that he was last year, and he wasn't bad last year.
Marq Goodwin - Super fast and, if healthy for an extended period of time, pretty dangerous.
The safeties have to respect the speed if Tyrod can make the throw, they have to. So the Anquan Boldin comment above makes no sense, it's not about who they are most concerned about it's about where they can line up.
This line means they have to go 2 deep and leave the middle open for Clay and Woods, or slide one way or the other leaving Watkins or Goodwin able to fly down the side...of course then the corners back off and the hitch stuff opens up etc.
It's a pretty damn good WR crew compared to almost any WR crew I can remember us having in recent memory. And it's better than most teams in the league.