I think that's true to a degree, but also very nuanced. For instance, I think some of the problem lies with Drake and his desire to play hero ball, which is understandable considering the success he had throwing deep, but you can't maintain that against top 5 defenses and have to adjust accordingly. Secondly, the play calling I think can be questioned at times. Take Kyle Williams, his college tape showed a guy that gets open within three steps, but he struggles to maintain separation. Yet for some reason we never fed him quick passes and tried to use him as a boundary receiver.
But in any case, Fields is one of those receivers who is never going get yards of separation, other than on blown coverages, that's not his strength. His strengths are his catch radius and competitiveness. He would be a very nice option to have in the red zone, rather than burning through 4 snaps and going nowhere, which was an all too familiar occurrence last year. I'd be happy with him as a 4th or 5th round pick