Unity 2017.1.0f3 (64-bit)
Probuilder Advanced 2.9.7f5
I work very frequently on cylinder objects and smooth edges.
It's currently not supported by the UV tool. I use "manual/box" or "manual/plane" button to have a start, then I manually align each faces of my objects, and that's long, very long.
What would be awesome is a "manual/cylinder" button or an auto-growing-stiching function like that:
I currently align each vertex one by one: