IMO the M's 'defensive obsession' doesn't exist...  I think Z is just acquiring the best players he can afford while not gutting  the organization of talent.
This is an illustrative case in point.  6-for-1 for A Gone?  Sounds like Z has a very high esteem of the value of some legit offense. The fact that he wouldn't go 7-for-1 (and we don't know who the #7 was), that just tells you he'll only sacrifice so much for any one player. 
Gonzales' value to the M's just diminishes with each passing day...  as the article indicates, he's going to want big money.  Sure if he leaves you get a couple draft picks, but still, I think the M's are more likely to pour money in to pitching.