I think they want to start play before the recording punch in so the artist has a moment to hear the music before beginning the retake and so they know were in the song they are.
I too would love it if move to marker x was a possibility in the options to program a button on a controller in act.
Move to previous and next is a pain for what I want to use it for. If they can make it move to previous or next why can't they easily make it go to marker A through Z. Also an option to come in early by an offset of so many beats / seconds prior to the marker would also solve problems mentioned here and possibly a set of marker presets that we can drop in for various purposes maybe a set for doing overdubs and another for replaying a project that is being remixed using techniques for playing sections of music with various snapshots in a remix fashion similar to how the matrix is being used.
Think of all the creative uses you can always remix music after it is recorded the snap shot is a powerful tool for recording various shifting sounds and if we can compose using snapshots by shifting from one part of the project to the next then we can get very creative in production and plan it out ahead of time like we do with templates to save time.