Having seen a few clips and listened to Glass speaking, I'm not so sure he is the nice quiet type that we maybe thought of him as being as a player - he comes across as being pretty focussed and determined and that he won't take any nonsense. It's a strange combination of appointments, so who knows how it'll all work out, but it's more interesting than appointing some boring old McInnes copy like Stephen Robinson, Tommy Wright, or all the other usual names that are banded about.
I can't see Glass making much of a difference between now and the end of the season though - I think it'll be more a case of assessing the players - doubt he's going to transform the formation, style of play and attitude of the team in the remaining few games. Might get a bit of a bounce for a couple of games if players pull their socks up a bit though.