I would guess ruled out based on Gross being unsuitable for a CM role. Propper is certainly used to being further forward. As I said above, they should be fighting for the same position in my opinion.
I said at the time of signing Propper that he didn't fit the profile of our other CM targets (Delaney,Neto).
I think it's fairly obvious Hughton wants two hard working midfielders shielding our back line, but our recruitment team offered him up two attacking midfield players (Gross,Propper)...