But what I really wanted to know is if at least the RT-AC1200G+ will be supported by AMAS.
from the PDF
2. What models are going to be supported?
RT-AC68U, RT-AC1900P, RT-AC86U will be supported first, and we are planning to
support GT-AC5300, RT-AC5300, RT-AC88U, RT-AC3200 in near future.
Later, RT-AC87U, RT-AC66U series, RT-AC1750, BlueCave, Lyra and DSL-AC68U will join
this family as well.
Notice: For RT-AC87U, early version RT-AC66U (A1), RT-AC3200 will be limited support
with some functions due to chipset vendor limitation.
If you want to be early an adopter of up-coming model, please contact us.
so you out of luck with the 1200g
Media bridge type connection is not guaranteed to be supported.
media bridge is just the backbone connection , so yes any device connect to this system can have ethernet devices connected to the second or third and it would work as a media bridge