Please let me recall my question: will Mageia6 allow to install Grub2 on PBR --during install?
Okay, maybe you are right. As I said I cannot recall and I do not use lvm.
And maybe I did redid grub to its partition after the installation (which is not a big deal, to me).
So, if someone else wants to take a jab at this issue, be my guest.
Good luck and take care.
[ps & edit] - One of the reasons I do not remember is I have quite a number of other distros in my systems and I do test out some installers (calamares for example)
and I do agree installers should allow for installation of bootloader (or not at all) to partition (default to mbr is fine). Calamares started out with lots of issues (cannot install to partition or none, swap changes, partitions rearranged) and because the developers are very responsive to feedback, it is (IMO) now very very good. It allows for partition labelling and command line interface in future versions.
As a side note, swap uuid must never be changed by installer. Debian installers do that. And Mageia (not sure if this has been changed - no feedback, no response) does not handle uuid changes ...er, 'well' ? despite making changes to fstab and /etc/default/grub.
Why do we live? To prove not everything in nature has a purpose.