I don't really know. I haven't had to use it or anything else to preform those sorts of tasks for years to be honest. I just let Fedora (or whatever) format whatever disk I'm installing on as it likes. Of course I expect my usage is not typical, I also have a rather low amount of data that I keep around (below 15GB) so it's not really like I have complex disk needs. So this parted nonsense doesn't actually effect me, looking from the outside I just think it's dumb as hell.

I expect FAT/VFS/HFS/etc have an equivalent of e2tools. I never really used those FSs anyway.