Really like what you've done, Im sure you've learned alot doing it too. One thing that's often overlooked is the fact that these "hit rates" are a reflection of the mistakes being made by GMs on different position groups, the harder it is to find good players later in the draft simply means GMs are more proficient at evaluating those positions. Trying to outsmart opponents with these is a fools game.
If you'd have split DL by DT/EDGE, you would've noticed that you're very likely to find EDGE players earlier while IDL guys are very boom or bust in the 1st round. DTs have one of the most elite player success rate in at the top of the draft but also have the highest bust %, while the EDGE players have a very low elite success rate but are near the top of the groups with good players.
Lets take WRs and DTs for example as this illustrates my frustrations with the way Grier operates when picking players in the draft. WRs are one of the most top heavy position in the draft and also a high value position(top3) while DTs arent all that top heavy when speaking of non-pass rushing players and arent all that valuable.
Grier has used a top 60 pick for a DT in 2 consecutive drafts going as far as picking one at 13. Those 2 moves dont make any sense whether we're talking hit rates or positional value. There's really no way to justify this, NFL GMs dont value guys like Wilkins and Davis all that much and let them slip all the time and they also dont pay for them in FA. OTOH the Fins havent spent a pick on WR since 2017, using a 7th on Ford
What Grier is doing is trying to beat other GMs to positions they dont care about and letting them pick the players they're very good at picking before he does. I really like the fact that he did get an understanding about overall direction and asset management, there are mistakes here and there but overall, the Fins are very well setup for the next 3 years. But its not going to matter if he keeps picking players like this. The size of your stack doesnt matter if you're the fish at the table.
Very nice OP.