ESPN aren't the only ones who think that. Seen the Indie make the same assumption.
Lets not forget Gatland coaxed some very good performances out of him in 2009. He might well fancy doing the same again. Some of the traits he brings - lineout, raw pace - are one-offs in a way no one else in the back row can match. Given there are no consistently good lineout throwers available, other than Hartley, and that we will be playing on hard grounds against fast and expansive teams, those are important traits.
I've rewatched the first sixteen minutes or so of the Wales match again in very close detail. Croft did nothing, almost literally nothing. He was stood around outside centre for the most part, a planned support runner for ball that never came and a chaser for Farrell's long bombs. I can see why Croft doing nothing annoys people, but that's the coach's decision, not his. Tom Youngs was similar - a midfield ball carrier who only got one chance to do it in those minutes; Ritchie Gray frequently takes up a similar position for Scotland, O'Mahony was heavily criticised for being so wide for Ireland. Hell, you probably remember the criticism of Ben Morgan for being under involved very well - not his fault the coaches have him covering the long kick so often, but on first glance it makes him look lazy. Croft was covering the odd kick while Ashton chase too. Remember Phillips quick tap, where he shrugged off Ashton? That run ended with him being hit by Croft, head on stood in the winger's space.
The use of forwards to cover the backs, particularly the back three, is going to continue unabated. I'm hoping rugby fans move forwards and accept this and stop blaming the players so chosen for being uninvolved - something I'm as guilty of as many. I've no problem with people looking at what Croft is doing and deciding they still don't like him (save thinking they're wrong), but far too many don't and just produce lazy stereotypes.
As for Robshaw - he is not an outstanding carrier, no. He is useful though. If he sees a gap, he will take it. He's a good carrier in traffic - one of the reasons his carrying stats look poor is because he does such a lot of this work - although I'd accept there are better. Compare him with O'Brien though - no one will doubt he is a good carrier - and they are frequently performing the same role of hitting up slow ball around the fringes. They are producing similar statistics.
The shame with both men is they have more to offer in a more open game letting others do more of the donkey work. Robshaw isn't an explosive carrier, but he does have very good hands. He's probably better at draw and pass/offload than either of our centres (not a high bar...) and can put support runners through very well. Marler's similar actually, lovely hands and awareness that are wasted with us at present. Remember Ashton's try against Scotland though? Created by Launchbury's big carry, in turn created by Marler drawing the defenders and then putting Launchbury through with excellent handling.
edit: I would be pretty angry actually if we threw away all the hard work on defence to turn us into a team that leaked. There needs to be a bigger emphasis on attack, I want us to be the complete team and that involves attack too, but Lancaster's task is blending that. I personally think that can be done with only a few personnel changes. I'm not saying no to a bigger revolution, but I do not think it's the only way.