Always depends who you have to drop, but I think so. Packers run a lot of three wide receiver sets. Cobb is gonna get attention, someone else will be open. I don't expect multiple TD's weekly, but he can definitely fill a void/give you depth. If you're a Dez owner, he might be a decent option.
Stevie Johnson is worth rostering as well. Least until Gates comes back.
I started Andre and Tate at receiver this week, both gave me 2 points, and john brown at the flex. Not wanting to drop tate or andre because i think they still will have some decent season until im trading for RB/WR1s
but on the bench V.Jax, J. Bell, Cruz and Wheaton can be on the chopping block if need be