You can become a Supporting Member.
I have 4 of them with no slow/sticky tailcap switches. The switch on my CU version is not as smooth as the others but not slow/sticky. I would try to add a small amount of lubrication to the outside diameter of the push button and see if it helps. If not get in contact with Olight as they will surely send a replacement.
my m1t switch has no issues either, but what do u mean with cu ? there is no copper version of the m1t yet..