Autolands in CAT 1? Why bother having anybody up front driving then? Guess there has to be someone to talk to on the radio.
The MLS signal has very different characteristics than the VHF ILS signals. Don't use marker beacons either as MLS is 3 dimensional. Still need to keep a/c and ground equipment from parking in front of the antennas (there are two, an azimuth station about 5m x 3m and an elevation station that is tall and skinny. The exact placement of hold short lines etc would be a function of the airport and installation, but in most cases are not as limiting as the ILS.
The IFR acceptance capacity for a runway in many cases is driven by the time for the a/c to land, decelerate, and clear the active and the margin desirable in case of a missed approach. Many airports are not this simple with parallels and taxiways all over the place. IFR departure capacit more a function of the parking areas behind the hold short so one can get a good bunch lined up to go. From the passenger/airline point of view most delays are between the runway and the gate.
with the MLS the receiver has to have a processor also to provide signals for the ILS style cockpit displays (either steam guage or EFIS) This does not use the capabilities available from MLS, such as curved and segmented approaches and data link, butthen again until the procedures and Mk1 Mod 0 pilots are retooled these will not be used anyway.