Looking through your achievements, you don’t even have “Fighting with style: Challenging” which brings zero credibility to your argument since you never obtained the original Mage Tower transmog.
As someone who has 30/36 appearances from the Legion Mage Tower. This variant of the system with zero borrowed powers only goes to every flaw in the developers class design.
In Legion we had the artifact weapon tree, two legendaries and the Netherlight Crucible System, Sylvan Elixirs, Drums with 25% haste instead of the now 15% at all on which we relied on. And none work.
By design, all Timewalking gear that was relevant tied to that expansion has worked in throughout that expansions dungeons and raids (eg: Warglaives, Val’anyr, Shadowmourne, Dragonwrath, Tarecgosa’s Rest, WoD Rings, Azerite traits) and ZERO of that borrowed power system has been brought into Legion timewalking.