Where was Brown taken in the draft? Dumb question I know because more than likely you don't know and will just google it and pretend like you do.
He was a 6th round draft pick end of the 6th to be more accurate, and had just 16 catches his rookie season. I'm sure there was someone who hyped Brown back in 2010 and there were some naysayers who immediately spout back about it.
This is the issue, you are basing you assessment on Mitchell from his single preseason game I am basing it on him being a 5-star recruit coming out of high school, an all-SEC player as a freshman in college, and then finally getting back to 100% from a knee injury this past season. I'll stick with my assessment and you can go with yours, I included Mitchell in every mock draft I did this offseason and I'm not backing off my belief that he can be a top 10 WR in the NFL.