Even I'm more optimistic about R20 than Cutman. Faster object handling is coming as is updated UV tools. It just won't be R19 however. R20 I'm picking. A lot of the stuff holding C4D back has been down to the old core. With the new core fully integrated (and it won't be in R19) then you'll start seeing better annual upgrades over the next few years.
My prediction for R19 is AMD Prorender, updated import / exporters, some modest MoGraph enhancements, some viewport enhancements, no UV tool enhancements apart from a token gesture couple of minor tweaks, no significant modelling enhancements but one tool has probably had some love then from some under the hood stuff to make modelling / polygon construction work with the new core that's coming. Plus a handful of other enhancements e.g. team render, minor character tools and dynamic system enhancements. No material node system in R19. The faster 3D painting may or may not come in R19 following the public beta preview.
If you wanted GPU rendering then you'll be happy with R19. If not then you may be disappointed. Look out for MAXON making a big deal of it as there likely won't be much else to get excited about. We'll all know soon as Siggraph is in a few weeks time.