Ignore 90% of answers who just love go against someone saying anything wrong about the game : they are not thinking a single second before posting.
OP is right : i agree the first trait of Mythic+0's azerite armors should be very lower than that :/...
The second / third / fourth being locked behind a big number is okay, as it replaces Artifact power farm, so it shoulds unlocks after a few weeks of raids.