Do any of the cubase developers use their own product !!!.
One of you need to get a copy of cakewalk pro audio ( 9 or bandlab )
and have a look at how “punch in” should be implemented for audio recording.
Not much point in me upgrading from 10.5 if you aim to keep the current useless punch in system.
What do you find useless about it? What specifically are you trying to accomplish that it won’t let you do?