No, that is not the reason =)
Is the world goin to end, ... again ?

... or even worse, ... is pixologic about to buy MM?

Ahhh yes,
great to see the caly brush in, thanks a lot for looking into it! Though, its not quite there yet imo.
i think the stroke would feel better if the points would freeze once the brush applyed 100% deformation to them and then idle till you let go of the LMB.
Right now if you draw a small disk and keep circling on it, the points move around like youd be mixing dough.
The endresult of a stroke is somewhat jaggy too.
it looks a lot better after applying a smooth stroke over it.
Maybe the clay could smooth itself from beguin with?
Would be nice to have some more/other opinions on it though, the caly been requested often.
Ah, and it really would make things more fluid if MM would remember a working directory.
Maybe, even a additional path for loading brushes and materials
i got all files parked away on my D: drive and MM installed on c: and now got to walk the way over for each file i want to add.