One of the KNOWN BIG PROBLEMS OF media composer's MULTICAM function is the inability to handle clips with cameras that goes on and off, like commonly happens with DSLRs, GoPros and a big bunch of other recording devices commonly used nowadays.

FCPX handles that kind of footage really well, and I think also premiere.

It's not so difficult to make a multilayer timeline with synced clips. You can do it using the "Auto Sequence" function and a bit doing it manually, or creating a multilayer AAF sequence giving to each cam it's layer, processing it in red giant's pluraleyes software and then roundtripping back in avid media composer.

At this point the difficult part is to convert the "synced sequence" that you get to multicam.

There's a way to do it, and it's explained in this video:

http://youtu.be/aDR8nRXSTyc

This method works really well, but preparing those kind of multicam clips is really annoying and time consuming. I think that nearly all the process explained in that video could be easily automated with just a tiny batch script.

A tiny batch script that would add to media composer a really requested feature.