If Moyes really thinks that Herrmann, Xhaka and Kruse can get United back on top of the BPL he might actually be as bad as the table says at the moment.
Don't get me wrong. I think they are all awesome players for us, but United has ambitions that neither Herrmann nor Kruse or Xhaka can fulfill right now. All they could do at their current level is keeping United in the BPL's upper midfield.
Moreover they all have ongoing contracts and even if Moyes (for what ever reason) thinks they are good enough to really help United we could sell them totally overprized.
But honestly I don't give too many shíts about those rumours. It was obvious that ter Stegen leaves us, but that doesn't mean the team gets ripped apart again.
Quite the opposite is the case: we are looking for excellent keepers, we are aiming to get a huge amount of money back for a player who hasn't even played 90 minutes yet. There'll be an awful lot of money this summer without a too big loss of quality. The players we are linked with clearly show our ambitions (Eberl confirmed our interest in De Bruyne; didn't work, but the direction we are aiming at gets clear).
I don't really see any player who could leave us this summer without our staff wanting him to leave. Kruse has just arrived here and the last weeks have shown that he is not totally consistent yet. Raffael is excellent, but already quite "old" and happy to be coached by Favre. Xhaka has just made it to the starting eleven and should be smart enough not to move away yet. Same for Herrmann who is not at a level to play more than 2 minutes for Man United. And he probably knows that himself.
So don't worry. Just see Borussia winning tomorrow. (maybe + hopefully)