BC came up through the talent evaluation side and was the guy responsible for "the book" (the player development objectives at every level). I think we have a much better chance at determining when to move on from players and might better temper the impulse go grab personal favorites on the FA market with him in the driver's seat.
Lavarnway, by contrast, was drafted with relatively little time behind the plate but great success at the plate. He led the nation (college) in hitting the year he was drafted. In contrast to Lavarnway, he's hit for average and power at each level in the minors. While it may be posturing on his part he attributed his lack of hitting success in MLB to his complete focus on the defensive side of the game. Considering he won the the international league top defensive catcher award it was a success.
Two problems with this "insight." The most obvious is that the players suggested in trade are hardly scrubs. Most of them are position players with high upside. We don't all agree on their long term prospects (e.g., I don't like Jacobs but some LOVE him) but those who've suggested the trades are on fan side.
Second, trades are rarely made for straight up replacements; they are made out of strengths in order to fill weaknesses. If ARI was to trade Upton it would be because they felt like they had enough OF help and could build a better team by turning him into one or more other positions. Specifically, ARI was looking for SS and 3B for Upton at the beginning of the offseason. They've already flipped Trevor Bauer for a SS so an Upton deal would likely hinge on an MLB-ready 3B with team control. Middlebrooks (or Mike Olt from TEX) would be much better trade bait.