They picked Gibbs when they had just signed Montgomery and Jaymo when they had St. Brown, those shocked everyone. That said, I'd be genuinely shocked if they drafted Love, but wouldn't 100% rule it out given it's Brad and he's unpredictable. I would imagine Brad has a board of prospects he likes, with all his players ranked. He'll draft his BPA on his board as long as he feels that player could be a benefit to this team.
Again, on picking an offensive tackle, he could draft one in the first round. I certainly hope he does draft one. I'm just not as strident as some around here that he will. If Brad is sitting there at #17 and there is a S, DE, DT, LB, CB that he likes better and has ranked as the best player available, above any of the remaining tackle prospects, I think he's going BPA, even if tackle were deemed to be a bigger need. He's not reaching for a player that he believes has less overall talent just because the need may be a little bigger at that position.