I am soooooo glad I came across this thread, absolutely brilliant work 
I would love to see this evolve to a point where you had real-time Maya <-> UE4 rigging & mocap support similar to that of CRYENGINE Cinebox.
I would also like to point out this thread of mine which shares very similar topics to this thread but more of a suggestion thread over that of a WIP thread 
UE4 Forum Thread: Support Live Sync e.g. Cameras / Lights / Rigs / Animation for Maya & possibly Max
CRYENGINE Cinebox Live Sync With Maya:
CRYENGINE Cinebox Mocap:
=XNm_44sY_ds
[HR][/HR]
P.S. I have started the conversation internally with some of the engineering team & we may very well step up to the challenge of bringing support to 3DS Max for the m2u UE4 Plugin 
@ You should also have a chat with 's MultiEdit - Collaborative Level Editing Plugin who also happens to be in a very similar situation as you in regards to developing a plugin & writing a thesis around it.