My god I'm so excited for tonight--even aside from the Pats. So many teams with huge possibilities. I'm dying for the Pats to get Fields, but I'm going in with the expectation it's not going to happen, and then I'll cackle with glee if it does.
As for BB's play here, he's gamed this out and has a price in mind for a trade for each guy at each slot ahead of 15. In other words, he's likely willing to give up Pick X and Y for Mac, and if Mac is on the board at 5, he'll offer it to Cincy (lol, but bear with me), if Mac's there at 6 he'll offer it to Miami, if Mac's there at 7 he'll offer it to Detroit, etc. If Mac goes to SF at 3, then he'll have a price in mind for whoever he ranks next, and so on and so forth.
At the same time, he's not going to deviate from his value judgments and if some player he really likes (e.g. Surtain, Parsons, Paye, etc.) starts falling, he's going to consider that in the equation and weigh getting Surtain at 15 (or possibly even lower) versus paying some cost to draft a QB.
TL;DR: I trust that BB has a grade and trade value in mind for his top targets and will react accordingly. Shocking insight, I know.