You read those same comments a lot because we start at the bottom and work up on solving issues, most of the time those simple things actually fix the problem. The most common problem we see with people that upgraded to their first graphtec is indeed using a different offset number than 0. With what you have shown it is usually too much blade expose, which of course with your years of knowledge already know about. But it is a process we start from the ground up to make sure it isn’t something simple. With your vast knowledge I am not sure what we can do to help you . . . Where did you find a new ce6000? They have been vary scarce since issues with the ce7000 cropped up.
the debate on blade angle is up to the user but for me I have exclusively used 60 degree blades in all my graphtecs and my rolands for over 8 years. That is a choice that works for me.