Hell no.
The only reason to get rid of Ownes was to get rid of the problems. And then you go add the problems back in with Johnson?
Pull your head out of your ***. This isn't Madden where chemistry doesn't matter and its all about the "player ratings". This decision was made for chemistry reasons.
Oh, and since you don't know: Roy Williams can demand double coverage. We have the top TE in the league, as well. We have some nice WRs in Crayton, Hurd and Austin. And we have a TE in Bennett that looked legit last year.
If we can add in another mid-level guy, then great. But we have our #1 in Roy. We have our #2 in Witten. We don't need another #1 WR.