I like Nyland. He had a shaky start To his Villa career, but in his recent outings he's looked as though work in training has played off and he's generally looked pretty good. I could see Reina being brought in as experienced backup, but I'm surprised DS is using him as number one; he's clearly not the keeper he was, and he isn't one for the future. If Reina was offered a longer contract I'd be astonished; he himself has said it's definitely only short term.
So, we have Heaton, Nyland and Steer. They're all good. Heaton to me is clearly number 1, and it's a toss up between Nyland and Steer. I'd edge towards Nyland.
If we let him go I think it's a pity. He's clearly ambitious and I don't think he'd want to stay around if he's not at least on the bench.
Don't know where Sarkic is. The Villa site still has him as being out on loan. If he is, probably the best place for him, although in the unlikely event that the season resumes we might need him. Reckon he's a possible one for the future