I thought they will be adding Substance Integration with C4D R18.
I’ll surely try out if it allready works in R17 though.
I know that C4Ds UV tools are somewhat dated and haven’t recived a major upgrade in years while other programms made huge progress with that.
But they’re not as bad as you make them looking with your post.
In fact i don’t have any major isues doing all my UV maps in C4D and never felt it to be bad enough to transfer my models to other apps just for doing the UVs there.
I’ve done organic and hard surface models, too. I’d even say it’s easier to unwrap organic models then hard surface stuff, since you often have less UV islands to work with, while a well optimized hard surface Lowpoly used for baking highpoly maps onto it, needs to be split into so many small chunks.
Sure, the Tools need an update and sadly R18 doesn’t come with it. (they announced it to be included in the service update to R18)
I just hope they do not decide to push it back to R19 or something.