Thin at the SF? First of all, If we want Burks to be part of the core, he should be getting most of the time at the 2, so Hayward really needs to play the 3. Second, Isn't filling in for injured players exactly what Richard Jefferson should be doing at this point of his career? He will be fine filling in for Marvin till Marvin comes back, then we'll see what Marvin has to offer when he isn't injured.
I do agree that we don't really need another combo guard. Personally, I want to have Neto come over right now. A little competition can't hurt things.