Terrible news about his brother and puts some perspective on this debate. I know some found Byrons style a bit frustrating, but I would prefer to start the season with him than without him.
I am sure SD did what he could to keep him but SD is operating with one hand tied behind his back as our budget didn't leave him with many options. Our budget will always leave us at a disadvantage in contract negotiations, with an improved offer Byron would probably have signed another contract, but SD didn't have the budget for that.
However when one player leaves another gets a chance to impress.