Hey there, the last time i was using W10 insider they was a VERY ugly trademark (for showing it's an unstable version of windows 10)
My suggestion is to convert this trademark to a button (like the report one on edge) in the task bar, because sometime (before come back to stable) some people asked me if i had hacked w10 or why i haven't activated it.
And besides that, i think having a more beautiful desktop on insider while keeping a way to distinguish the stable from the test version i could be very nice.
a fast photoshop it could be done like this, like that have an insider version is more beautiful and let know if windows crash it's a beta version so it won't "harm" the Microsoft publicity
Edit : of couse the report button will open the actual feedback app