I agree with Ferguson's rotation policy, it gives De Gea the experience he needs while doing the minimum of harm to our current campaign.
I would say rotation is doing more harm than good. No other top side in the world rotates keepers and it cannot help the defenders not knowing who is going to be in goal on a consistent basis.
DDG has performed a lot better when he has been given a run in the side. When Lindegaard was injured at the back end of last season and DDG was #1 would you not say he performed very well and looked a confident GK?
It is when SAF tinkers that we are back to square one and DDG goes out thinking he has to prove himself again, that cannot be helpful.
Van der Sar/Foster/Kuszczak in 2009-10.
IIRC, that stopped once VDS recovered from his injury he picked up in pre-season.
Yup, that's it. He's made quite a few mistakes this season already, against Chelsea and Fulham for example, where he cost us goals, and also against Braga where he distributed the ball straight to an attacker. If you want to believe that there's something causing De Gea's concessions to be "wrongly attributed to him as 'mistakes'" then you're welcome to, I find that kind of talk absurd.
The Fulham 'mistake' involved the attacker barging into him. If that was Cech or Reina, the ref would've blown for a foul.
The Mata free-kick we have already disagreed with. As far as I'm concerned it was a terrific free-kick, out smarted the keeper and little he could've done about it. DDG thought like last season where he made the magnificent save, Mata outsmarted him.
I honestly cannot remember the Braga error but even if I give you that and the other 2 and I'll throw in the error he had at Newcastle (which he corrected by somehow clearing it off the line himself) that is 4 'mistakes'. That does not amount to "quite a few mistakes" in my book.
At the same time, he has made some fantastic saves this season to keep us in games and won us points (at Everton, Fulham, Chelsea, Stoke, Arsenal & Villa).
Overall, his impressive saves outweigh his mistakes and if we stop with the rotation bollocks his mistakes will be non-existent soon enough and he will only get better. I cannot say the same for Lindegaard, who is a steady alternative but not as impressive and he doesn't have the same potential.