WR1 to me means good enough to be the top WR on YOUR team. He wasn't this year it was one of the reasons our offense wasn't better all year. The design of the offense with multiple TE sets and running the ball often was that we would have a WR1 who would be able to beat coverages and make plays within that system. What we discovered, with a few game exceptions, was he wasn't able to do that.
He was a WR2 playing WR1 this year. Next year I expect he will be better.
I would say anything less than what Collins did in his 3rd season, assuming MHJ is healthy and we don't dump Kyler and tank with a lousy QB, would be a disappointment for MHJ. That's 80 catches 1300 yards 8 TD's. The target to catch ratio will likely be lower because of the nature of our offense, Nico was 80 out of 109, Marv won't likely get to that.