Will closed stations still have open waiting rooms? Man I hope so!
I guess I don't actually use any agentless stations, at least with waiting rooms. But Tarrytown's agent goes off-duty at 1 PM and the station remains unlocked until around 8 or 9 PM. (You can use the bathrooms too.)
Yonkers stays open after the agent goes home -- until the last northbound train arrives I think -- but Yonkers is a little different. You need to enter the concourse (though not the waiting room) to get out of Yonkers station for one thing. There's also an MTA police substation in the corridor between the platform stairs and the concourse. So security or vandalism is not an issue with the station remaining open and unattended for long periods.
I repeat, removing agents is a significant downgrading of station service and I wish Metro-North would reconsider. Taking the human factor away is very depressing.
Save money! Remember when it came out a Metro-North board member was having a limo pick him up at GCT-Vanderbilt and 43d St entrance and take him to 347 Madison (2 1/2 blocks away) for board meetings? Who do you suppose pays for that?