It should be completely obvious to everyone that no stadium deal will be reached to try and keep the Chargers in San Diego during 2015 or early 2016. The question is whether downtown is the ONLY option the Chargers will accept.
I said this back in May, and I said almost 2 months ago: San Diego should be playing for 2016.
Until a decision is (officially) made regarding which stadium site will be selected – Inglewood vs. Carson – there is simply no reason for the Chargers to trouble themselves with trying to make a deal in San Diego.