Monogame currently uses SharpDx 2.6.3.
As of today the latest stable version os SharpDx is 3.0.2 which should have many bugs fixed (and yes, some news ones too I believe).
Updating to SharpDx 3 any time soon would be a great benefit as it would support dx12 and all the improvements that comes with it in terms of speed, threading, resources, etc. and this would attract more developers (hopefully) to the community.
Concerning the cons: it may have some parts used by MG that have changed, as for example it happens to the new Mathematics library which makes the core dll lightweight.
As always, a lot to do, and no timemachine available for all this, as MG must support OpenGL, Android, etc platforms.