I've been thinking about this for a while.
No, I don't think BB has a good record drafting WRs. Heck, one of the best WR he ever drafted was a QB. But, when i stopped to think about why were we able to keep being one of the best NFL teams for 15 years, i am almost glad we didn't find a great, future HoFer WR (Edelman still in contest though, lol). Why? It is not a priority for winning a Super Bowl.
Sure, when he's a rookie, we can ride that cheap rookie contract, and that would be awesome thing. But after those years are over, how much money does it cost to keep a A-grade WR (usually)? Over 10 m a year. That would be close to 10% of the cap space nowadays. Calvin Johnson's contract is something close to 16M/Y IIRC. It's that really the best use of cap space? To use on a player who will get, considering a great day, from 10 to 15 touches on the ball in a game? Honestly, i think there is a bunch of other positions that are more important than WR.
I did a bit of research. Since 2001, only TWO SB winning teams had a WR costing close to 10% of the cap space (I did not confirm how much was the cap space in that year, but my best recollection was not disregarded about that, so I'll just keep rolling here). That was 2006 Colts' Marvin Harrison(12M) and 2009 Packers' Greg Jennings(8.9M) - That's not even that much, but it was the highest paid WR in the SB in quite some time. And in those years: Colts were against arguably one of the worst teams to reach the SB in recent memory (Rex Grossman's Bears) and the Packers were cruising with a very friendly Rodgers contract - in 2009, his cap hit was merely close to 10M, in 2010 was 6M.
So, what I am saying is, although it would be great to have a incredible WR, like Randy Moss in 2007, I am not sure it is worth to pay close to 10M for a player in that position. I would rather have a LaFell (3.5M salary this year) than a Demaryus Thomas (13M this year) and spreading this money around, making us an overall better team.
I have given BB a ton of flask for striking out at that position year in, year out. But even when he makes a mistakes, it appears to be a good thing.
Sorry for the wall of text, but I was with that on my mind for quite some time now, hopefully my ideas are getting through clearly