No, a candidate for AMF would not be put in the metro at 1200 hours. We have Metro first officers that reach their 1200 hours and are sent directly to the 99.
If you won't accept a run under 2 hours, then this may not be an ideal place for you. There may be times where 2 hour or less days are necessary to cover lines or TDY.
Wouldn't trade this experience for anything. I've learned a lot and working with older equipment has been great in its own way. Some dislike it here, others understand what it is and what one can get out of it.