I have some reservations for the division rival thing. I was surprised to see Jim fixing Hamilton's O-line problem when other western teams would likely have been receptive to a trade. Having said that, Bomben is one player. Hardly a chemistry disruption to replace him, given that White and Piotrowski have been with the team a while. Then there's Blake, whom they must really like if they were willing to trade Bomben. Also, it's possible that Bomben was the player Austin wanted, the proven guy. I'm not terribly worried. Yes, we solved Hamilton's ratio problem for them, but Bomben won't be playing on the same O-line run by the same coaches. Part of what makes our O-linemen consistently successful is continuity and system, which aren't always present on other teams.
I mean, for us, replacing one guy feels like a big chemistry disruption, but we replaced two guys last year (Bomben replacing Flory, Matte replacing Woodruff) and it worked out fine, even with yet another new position coach (Sweet). So replacing one guy when the replacements aren't green (White or Blake) shouldn't be an issue.