Man you love for JJ is blinding. Did you stop reading my post after James Jones? Amari Cooper in the pre season was still Oaklands number 1 WR on the outside like the 9 other guys I named.
Even the highlights that dont tell the full story show him consistently playing against the other teams number one option on the outside. Like I said before rams rarely used their CBs to shadow WRs and if they did it was Tru matching up against bigger guys like Alshon, Megatron, and Michael Floyd, so both JJ and Tru faced number 1 guys on the outside it wasn't JJ shadowing number 1s.
If JJ was exclusively covering number 1s the Rams would have franchised him not Tru, because they couldn't afford to loose a guy with that type of impact, but that was not the case at all. They both covered number ones when they came to their side of the field with Tru shadowing bigger WRs when the gameplan called for it.