You are fine at QB but should NEVER draft 3 QBs. Its a wasted pick. Schaub will be top 10 if healthy, and Edwards will have 1 nice season with TO. Eli is a bust waiting to happen this year, he's never been a good fantasy player.
Outstanding. Turner is the clear #2 RB, and Slaton is a great RB2. Kevin Smith is a definite sleeper. He put up 8 TDs and nearly 1000 rush yards as a rookie for a team with 0 wins. It can only get better for him.
All of those guys are risk-reward. Marshall and Ocho have injury and off field problems, and Chambers is always an injury risk plus there are too many other options in SD. The bench is very ehhhhh.
You are set. Cooley is solid and Shiancoe is a good TD threat.
Fine on both.
All in all you have good starters but thin bench. Dump Eli Manning immediately you do not need him. OR wait a few weeks while Trent Edwards starts out hot, then trade Edwards and one of your WR for a better WR and RB depth.