I edited my long, descriptive
post again.
I just realized that the loader has to report what config version it's trying to use and that it was DM that was seeing the wrong version and deciding to just boot from a disk so my theories that some loaders could work with v2.2 just by changing a configuration were incorrect. Only v2.1 would work without an update (but with the NoDisk setting being interpreted as the Widescreen setting) because of it's incorrect version number.
At least now it looks like GX and CFG have updated
I don't think WiiFlow has yet and DM(L) Booter r28 and up should work.
EDIT : Okay, now WiiFlow has been, too. I don't follow PostLoader too much so I don't know about that one.