It sounds like DGB had some other issues that we/media were not aware of. Pinkel hinted at that after he cut him....really makes me wonder what else he did. The kid had everything in front of him and he couldn't keep it together for one more year. I could careless about the weed stuff...but the dude clearly has some issues.
Regardless, it will hurt to lose him next year, but 100% the right decision.