Hi, for technical limitations, the Style Editor doesn't handle the nodes as "geometry" items, but everything is stored in a XML which is evaluated and processed by Max.
Because this, most of changes in the Style Editor requires to re-evaluate the nodes graph, and therefore rebuild the RC object.
I will check it's possible to optimize it for 1 (generically, not update when moving nodes), but i'm afraid 2 and 3 cannot be avoided.