The anti DDG agenda from many United fans is a bit weird.
I think this stems back to the first few games of the season, when ETH must have given instructions to build from the back, and DDG made it look like he was playing hot potato any time the ball came near him. He has clearly improved since then, but he will never be a natural with the ball at his feet. For those that remember Schmeichel, it is also sad to see a keeper that lacks so many of his attributes. He commanded his area, came confidently for crosses, scared strikers in a 1 on 1, had a great long throw for distribution, and even scored goals. DDG is a great shot stopper, but is mediocre at best in all of the other areas.
It would be stupid of ETH to tell him he's finished at United before we have a replacement in situ, but I do think that longer term he will be replaced by a more rounded keeper. I think the wages, and requirement for first team guarantees may determine whether he is kept on after the summer. In his favour, ETH probably has higher priorities at the other end of the pitch to splash the budget on.