I don't see why you want to downplay everything. Yeah, he's good, nothing more. Said the same about Carrick and plenty of other United players, seems very harsh. Evans was reliable that year and that's all you can ask for from a 21-year old. He played in just under half of the games during that clean sheet run and was solid throughout. Yes he played in a strong defence - although a mainstay of that defence was O'Shea, yet another solid defender that people wanted rid of every now and again, so what does that tell you - but no defender can do it all on his own, even the best defenders will look worse in a poorly organised defence.
Evans is just like Carrick, some people find it very easy to criticise him and very hard to praise him. I'd say in part because he lacks the very English qualities of getting stuck in, putting his head where it hurts and fighting for every ball...despite the fact that much of the time this can lead to players being caught out of position, a lot. People see it in Phil Jones, for example, and it covers up his deficiencies so he gets less criticism than Evans despite being more error prone.
He turned 24 in January lads.