I think the Roberts situation is nothing to do with footballing ability. There is obviously something behind the scenes with him, maybe it's injury related, maybe Warnock making a point as someone brought Roberts in over his head? Who knows. But Warnock has gone out of his way to not play him.
Nelson would be a fantastic signing.
Nelson would be unbelievable. He was great at Hoffenheim where he scored 7 in just under 600mins. I think injuries have held him back a bit but hes very highly regarded at both Hoffenheim and arsenal. But... I'd still be worried hell come in and be just a like for like replacement for Roberts in terms of being used. I've grown used to us signing wingers over the years and not bothering to give them a chance at this stage.