Totally get it on BTJ. But he has blazing speed that has to be respected in a huge frame no less. If teams have to play high safeties or else get burned for a TD in the blink of an eye, that's where the underneath mismatches get exploited with all the short area/YAC threats we have (Kincaid, Shakir, Samuel, Cook, and Josh).
So I could definitely see a bust if he's expected to be your #1 from day 1. For a fit with the pieces around him I think he works very well with the skill sets we have decided to emphasize on the roster.