If the New York Rangers manage to keep Jesper Fast, Michael Grabner, and Oscar Lindberg in the Expansion Draft, odds are they will not need a fourth liner anyway. The fourth line would consist of those three players, with Glass’ role being a healthy scratch or off the roster altogether.
Additionally, Glass’ role is not one that needs to be filled. Glass brought little to nothing to the table in his time in New York outside of a few meaningless fights and a couple of strong playoff games.
In reality, the Rangers are best off recognizing that enforcers are not significant parts of successful NHL teams (just look at the Nashville Predators and Pittsburgh Penguins) and ignoring the fact that Glass is a goner altogether.