In the end, Transmog doesn’t matter.
It’s never been a thing in the past so who cares?
It’s technically a free mechanic they everyone has access to and most people don’t have like 100 pieces they want converted anyway.
The 10 (20 next season) is honestly enough for a lot of people, if you want more then pay for it.
Simple as that.
The issue is that we have a very simple system of just swapping ornaments. If the devs just unlocked all armor as ornaments and charged us in game resources (shards, cores, etc) then that would be fine.