Cinema has been way ahead of the Maya plugin, as far as release (vs3 testing release 4+ months ahead).
Features such as procedural displacement have been in C4D and Lightwave for quite a while.
Procedural displacement was a feature request for the Maya plugin about 2 years ago but we're still not there.
There has been a switch of the lead programmer recently, and only time will tell, how this pans out.
I would have like to have seen at least 2 main programmers on the plugin.
This may all sound pretty negative, but VS2 of the plugin is very stable and usable.
The main issue for me, is that I recently had to put together a rendering solution of hardware and software for a large automotive company.
I could not list Octane as the main render engine, due to the above, along with several other issues, including a general lack of support.
Doing some R&D and testing, I found the Iray for Maya had been released (now direct from NVidia), with a 90 day free trial.
Out of the box, Maya procedurals are supported, along with procedural displacement

, faster loading of large data sets etc. etc.
It's a real shame, but I had to recommend Iray for Maya as the software side of the rendering solution.
Had the Octane for Maya plugin been on a par with the C4D version, I could have recommended Octane.
I hope that the new programmer brings the Maya plugin up to date with the other apps.