It depends on how many you think of as hell of a lot, that would not want to stand or move seats. The entire area would probably be 800 seats at most, of which a certain percentage would either agree to stand or move seats. The disgruntled rest would have to grin and bear it. If it was for the good of the club because of a better atmosphere, I think the whole entertainment package would be better
Personally of your list of out of contract players, I would only be worried about 5 of them. Mulgrew, Evans, Graham, Rodwell and Reed, the last two are only there on potential
Personally I think it would be better if there was no music at full time . Let the fans show their appreciation for the team and let the team enjoy it.