Yes, I have good news. I have a working version for R15.
I just wanted to go the extra mile and expose the rest of the new bevel tool settings.
I posted an early screenshot via my twitter account a day ago.
The new Chamfer Maker will have a mode called R15 that exposes all of the settings of the new bevel tool while the old bevel tool settings (Convex, Concave, etc.) will be emulated with the new bevel tool as well as possible so that scenes saved in earlier versions of C4D can be opened with the R15 plugin.
Now, that said, since the new bevel tool operates differently to the old bevel tool (particular the triangulation of inserted geometry, as you are no doubt aware) the R15 version of Chamfer Maker will reflect that. Also the Variance parameter is gone (the paramater that most closely resembles variance is tension in the new tool but the offsets aren’t randomized for tension).
Maybe I will insert my own little routine for randomizing offsets at a later time but that’s the current plan.
I should be done in about a day or two.