I don't think Chris Grier's ~50% hit rate on OL prospects is necessarily bad. I just think we don't have an OL that's worth very much and that's ultimately his doing.
Like, yeah, he drafted Laremy Tunsil and that's a "hit" (if you consider a player falling into your lap such a thing) but Tunsil plays for the Texans now. We purposefully traded him away for picks and spent a large amount of money bringing in Terron Armstead to replace him who in turn cost us a lot of money while missing a lot of time.
As I've said over and over about Chris Grier, you cannot lazily judge his moves in a vacuum. You have to judge the end product and then evaluate the combination of things which led to where we are. A GM can make a series of what are theoretically "good" moves that still don't align with each other.
I just think having a shoddy OL filled with developing players who need to get better and aging vets who struggle with injury hurts the team when the QB is known to be small and not super mobile. The team badly needs to be more physical and run the ball to form a better identity and yet we have an OL that struggles to run when it counts.
We hired a young HC with run-game-coordinator background who's brought in good OL coaches and we've spent a lot of time asking him to work with middling talent. Fix Austin Jackson please. Work some magic with Liam Eichenberg. Make Robert Jones look alright. Deal with a permanently-injured LT who's not there half the time. Replace multiple pieces every year.
OL should've been a key priority for this team when it decided to build around Tua--probably more than WR if we're being totally honest. I will always wonder what this team could've been had it retained the R1 and R2 picks it lost in the Hill trade along with the R1 pick taken for Ross' tampering.
And again, you probably don't feel the pressure to go after Tyreek Hill if you're not stuck with crappy weapons like Devante Parker (R1), Leonte Carroo (R3), Jakeem Grant (R5), Isaiah Ford (R7), Durham Smythe (R4), Hunter Long (R3), Preston Williams, Mack Hollins, Lynn Bowden, Adam Shaheen and Allen Hurns.
You can't isolate one part of the team. You must see the whole picture.
I probably speak for everyone when I say that I don't love the idea of being an offense reliant on Tyreek Hill. If he's the only reason we're good, then I don't think we're legit. You need to spend the early years evaluating who your QB really is. If he doesn't elevate the franchise then he's replaceable and not worth $50M/yr.
So now you see how all this stuff is hard and getting it wrong in one area leads to issues developing in another.
If we end up neglecting the OL because we pursued Hill largely because we sucked at the position and the Hill acquisition leads to us re-signing Tua all so we can ultimately come back to rebuilding the OL only too realize Hill is getting to old and Tua can't carry the team...what's it all for?
I keep saying this but the job of a GM is to create value. If you create holes that require compensations you're going to end up crashing the plane even though you appear to have a decent roster.
It is really hard to get it right in the NFL. The overwhelmingly majority fail for the reasons above. Stuff goes wrong. The bar needs to be exceedingly high and you need to be honest. You can't simultaneously be a fan and have a grounded opinion. It's one or the other.
Fans will tell you all the wrong things because they're optimistic about everything, all the time. That's why even in a year where we lost talent and signed a slew of small-time names you get the majority of people saying we did well. When was the last time a fan said we didn't win the off-season?
I want the team to win but it has to start getting in front of all the issues it has. You cannot be losing players and plugging in 1- and 2-yr stop-gaps every season. You can't draft good players like Tunsil, Wilkins, Van Ginkel, etc. and then just let them go to other teams. You can't mortgage your future on Tyreek Hill just to prop up your lousy offense that sucks because you filled it with crap prior.
We have been a paper tiger because our core has never solidified. We allow holes to develop and we patch them. That's what we do.