More Sketch Layers?

Why can I not split Sketsches in to more sketch layers?
That seems kinda missing?

It is as specially very unhandy because they are cutting each other the hole time.
It would be very handy if you could split them in groups or layers, to have less interferes.
That could give as example the possibility to lock a hole group or chose faster.

Or am I missing some kind of way to go?

We totally agree. Sketch groups / layers or a solution to your problem is on our roadmap