There are several “serious” issues here but the “feature” itself.
- the “feature” made to the final release
- despite it seems the “feature” was known before the final release, it was passed on to the final users and no information was given about it and the relatively easy fix
- the “feature” showed that Grub is not configured depending on the actual disk partitions, it is just a default config file that is copied
I am not upset, I am saddened.