I understand about bedding him in, I know it's a new league, country, language etc etc etc. But the thing is is that we can't wait three or four years to do that at this rate, it needs to be soon as possible. Carragher isn't good enough anymore and he's only going to regress even further. It's worthless trying to establish a partnership between him and someone else when really he shouldn't and probably won't be first-team material in the short-medium term. He's 34 in a couple of months, no pace, no aireal presense, terrible distribution, and is making individual errors which he didn't do for years.
If Coates comes in and plays and makes mistakes and looks dodgy then that can be fine to an extent because he's young and it's all part of his learning curve. He can learn to iron them out, learn to play with the team and learn to play with a consistent parter/defence in general. Then hopefully in a couple of years he will have matured and be the figure at the back for us that Carragher has been.
We simply don't have the luxury or time to persist with Carragher and somebody else at the minute, it's holding us back significantly.