You have to wonder if playing in a huge stadium like Qualcomm makes sense too. 70,000 is a lot of seats to fill especially when they sold 20,000 tickets to last week's game. A smaller stadium that seats 30-40k would be ideal, no? Better to have a packed stadium than one that appears half-full.
Yes to all of this. Having been to games with 25K attendance in a stadium that seats 70K, it's tough to have a good atmosphere.
Although you can pretty much pick where you want to sit, there's never a line for the bathroom (or beer), and the tickets are generally pretty cheap anyway.