The double DB 2nd round was a headscratcher for sure. I understand BPA and it was Poles first draft with a depleted roster so he's just looking for starters, but at some point (and this is something that Pace struggled with imo) the position has to be more relevant. If not, you end up taking solid players at LB/S/TE/G (Because BPA strategy and all the other teams are drafting players at important positions) and then drafting important positions late (WR, DL, OL).
Then all of a sudden you have solid players at positions that aren't as important like the Bears roster now, and you have really bad players at positions that are really important all because of BPA. There's gotta be a happy medium.
I believe that you have simplified the situation.
BPA means that, when the Bears are on the clock, they pick the one player that is head and shoulders above everyone else that is still left in the draft.
If there are a group of players with the same rating, the Bears can either draft the BPA at a position of need or trade down to get extra picks.
Now, we do not know how Poles had rated his draft board, so we do not know if he followed the BPA system. We do know that CB and S, especially CB, were positions of need. We might be able to guess that Pickens might have been completely off the Bears draft board, seeing their aversion to risk, meaning that he would not have been picked up by the Bears even if he had gone undrafted.
So, picking Gordon and Brisker did not have a huge deviation from BPA and certainly not from BPA at a position of need.
People need to remember that, per some front office person who I forget who he is, the difference between a good team and a great team is usually four or five star players on the team. Yes, QB is usually one of those 5, but the other players also matter.
If Poles ends up hitting on both of those players (big if), then the Bears have two star players that can be counted on for the next decade.
Imagine if the Bears had Brown playing safety for the Bears during the 2006 Super Bowl. Would it have been a huge upgrade to the team? Yes, Tommie Harris playing would have been more impactful because he was a star at the most important defensive position, but would adding a Meh player at 3 Tech have really helped the Bears more than a star safety?
As for Pace, he was NOT always a BPA GM. A perfect example was when they drafted Kmet.
When the Bears were on the clock in the 2nd round, Kmet was a long way away from being the BPA left on the board. What he happened to be was the top-rated TE, a position of need that year, coming in a weak TE draft class.
So, Pace did not follow the BPA philosophy and ended up with a TE that is not very special.
Poles has to follow his draft board, removing players that he believes are undraftable for various reasons (Pickens?) and then drafting one BPA who is head and shoulders above the rest, drafting a BPA at a position of need from a group of similarly ranked players or trading down to get additional players.
It is possible that he did exactly that. Since the Bears were bereft of talent at multiple positions, Poles let the draft come to him in the 2nd round, not reaching for lesser talent at more important positions of need.
There will always be some players who do really well while coming from lower draft picks. Unless you have a time machine, these players are difficult, if not impossible, to guess that they should have been drafted earlier.
As they (almost) said in Buggs Bunny,
"You got a time machine?"
"N-n-n-no."
"You know where to get a time machine?"
"N-n-n-no."
"Then shut up."