Most of the issues you describe sound either trivial or non-issues entirely. The mixed-endianness of GUIDs sounds annoying, but also easily worked around. It s

Most of the issues you describe sound either trivial or non-issues entirely. The mixed-endianness of GUIDs sounds annoying, but also easily worked around. It seems worth putting up with for the resiliency offered having the GPT duplicated at the beginning and and end of the disk. I'm not sure the UEFI system partition has any practical need for anything newer or more complex than FAT. It is a very simple file system for which support is ubiquitous, and is far more capable than an MBR boot sector. The EFI executable format being derived from Microsoft does not seem like an inherent problem, unless you can point out some meaning limitation it has compared to an alternative. However I do not know enough about binary executable formats to debate the merits of PE over ELF, so I could be missing something. It seems to me the benefits of UEFI far outweigh the negatives here. And with UEFI now being ubiquitous in consumer and commercial hardware for about a decade now, I do not think a bleeding edge distro like Fedora dropping BIOS/MBR is a huge deal.