Most razors can be found in the wild between 15 and 25 degrees. Most are close to 15 than 25, but wider bevels do exist, and they do shave. So unless you put enough tape on the edge to make a 30 degree plane bevel, I doubt you diminished shave quality by changing the angle.

I have a couple of vintage blades that came with little spine wear, but cracked blades. They had to lose between a quarter and a third of their blade width, which makes the angle far wider than tape. They shave fine.