For what it's worth, here is a video of my test showing the relationship between control input and aileron deflection. This is in MSFS 2024 using the latest version of the Vulcan. I tested on the ground, having spawned ready for take off on the runway. I didn't have time for an in-flight test yet.
I used the debug tools in the SDK Developer mode to display:
Flight control position
Aileron deflection
I held the flight controls at 25%, 50%, 75%, 100%, and noted aileron deflection - it was consistent both left and right at 5, 10, 15 and 20 respectively.
https://youtu.be/l8nzZrM9UQQ
So all appears OK for me, at least regarding the correlation between control input and aileron deflection. I'll take a flight in the Vulcan in the next few days, and verify roll rate is consistent. I'm pretty sure it will be, as I'm sure I'd have noticed such a discrepancy.
Not to say Yoyo isn't having a problem - clearly something is wrong in those videos, but it doesn't seem to be universal.