This is already dead, most of them have closed, only leaving a few in Liverpool city centre. They're bad convenience stores coupled with bad ticket offices with a longer queue than necessary. Curiously though the Liverpool Central one remains, despite there being a Sainsburys Local directly outside.
They do need to bite the bullet and close the smaller booking offices (could be done by natural wastage as people leave) and move to TVM, e-ticket and contactless. The booking office at Aughton Park, for instance, is just a waste of space. They've decided to keep guards, so people can ask them for assistance if they need it.