Stating the obvious here, but much will depend on how these players continue to develop and whether or not they can translate their flashes to a larger workload. The number of guys capable of showing glimmers of talent in spot duty is a lot larger than the number of guys who can do it consistently over multiple seasons.
I posted my 2019 rookie rankings in the spring.
I think my takes on Jacobs, Deebo, and Montgomery have aged pretty well. "They are who we thought they were!" Always felt Deebo was a little underrated when you looked at the draft slot, game tape, and athletic traits. Had he gone five picks higher in the NFL draft and been a "first round talent", he probably wouldn't have been available so deep in rookie drafts (he often fell to the 10-12 range). His rookie year has played out almost exactly how I predicted. Montgomery was going very high for a guy with some JAG red flags. The worst fears have been confirmed so far. No explosion. Volume-dependent. Still early in his career, but it's not looking good so far.
I also think I also had a pretty good take on Marquise Brown. We're seeing the good (explosive big plays) and the bad (constant nagging injuries). Still remains to be seen whether he's DeSean Jackson/TY Hilton or Will Fuller (talented, but always hurt). At least we know he can play.
In hindsight, it looks like I underrated Metcalf, Singletary, Hardman and especially McLaurin. I'll stand by what I said earlier in this post though: There's a leap from "talented prospect who flashes in spot duty" and "reliable multi-year starter", and not all of these guys will make the jump (that also applies to Sanders, Deebo, Hollywood, and others). We'll look back on this thread in a couple years and see that a few of these guys have fallen by the wayside. It's inevitable.
Beyond that, I like what I've seen from Knox. I had to decide between Warring and Knox in a lot of drafts, and usually defaulted towards Warring due to draft slot, scouting reports, and a lack of tape on Knox. I think I got it wrong though and if I could do it over I'd have Knox higher.