List of problems wip 7

I have attached a video where I find several problems or I still don’t find out how to use the new rhinoceros interface.

How to remove rows of control points, both on SubD surfaces and on nurb surfaces or am I missing something? if they notice in the video they are not allowed to delete the points, it seems that they are only eliminated in one direction. and it is hard to eliminate the opposite
using the keyboard shortcut ctrl C Ctrl V causes rhino to freeze for a while.
Each time I adjust the seam, new isocurves are created making the surface more complex.

problem.3dm (290.6 KB)