Lets be realistic - we've got 2 callow spinners, who haven't played much First Class cricket recently, let alone international cricket.
On a pitch offering much help, neither put it in the right place often enough, but both got better the more overs they bowled - and that's the key thing - they won't get any better unless they bowl more overs in the right environment. This is the perfect series to let them bowl plenty, and learn from mistakes.
I feel Leach grasped what was needed much more than Bess and improved through today - Bess, I'm still not sure about, I don;t think he's consistently threatening enough for this level of cricket - but hey, he need's the next test to show us all he's learnt something.
As for Swann, I think there is value in recently retired or still current senior players coaching. I think they understand far more about modern cricket than guys who stopped 10 years ago - the game moves on.
Dickhead or not, why not get Swann in with these guys under the watchful eye of a bowling coach and let him give them the benefit of his experience? And whilst we're at it, get Anderson in with Robinson and Mahmood, Rashid in with the leggies, and Trott/Bell in with Sibley / Crawley?