If both those players did come in then at least one of Barry, McCarthy or Besic would potentially leave in the summer window.
Ideally it would be McCarthy as arguably he's been the least affective as of late, yet would still demand the highest fee due to a few fators.
Personally, I think under Koeman he could be a better player as he was somewhat lost under Martinez but that's purely ifs and buts.
I think Koeman could get him back to his best. But I also think we could get a really good fee for him still. If we pull off both Carvahlo and Witsel, McCarthy becomes expendable and we make a tidy profit.
Just a hunch mind.