Maybe it is the pessimist in me... well actually more of realist based on repeated actions... but when the goalposts keep moving it makes you wonder and be concerned about what is going on. I expressed concerns when he wasn't ready for TC, but people (not saying RRB - I don't remember who said it) here said he'd be fine because the coaches said so in press conferences. Then more concern when they activated him from the PUP and then took part in zero team activities.
Yes, he had more going on than normal for an ACL tear, but that is part of the concern... Nothing seems to have a half-predictive timeline. And coaches are always going to tell you the sky is blue.
If they really wanted him to go slow, having him stay on the PUP - out 4 games - and then activating him would've made more sense. If he is doing team drills now, I guess he is a few weeks ahead of that schedule, but just being out of football this long starts to get a bit concerning for reflexes, strength, reactions, etc...