Lore
Looks like both changes made it in for maintenance today. All of the Wild Gladiator's armor pieces should now be available on the Conquest vendors, and there is no longer a 200-point Ashran restriction on the weekly Conquest cap.
So, slightly technical details here, but for those who are asking:
The issue with the Accolade trinkets is that there's actually just one item per primary stat (Strength, Agility, etc), which has a secondary stat randomly assigned when it's looted. We can't, for example, put the Int/Versatility trinket on a vendor, because that item doesn't actually exist -- there's just an Int trinket that can randomly have Versatility added to it.
This means we don't have a way to implement a non-random method to get them via hotfix. We'd need to add new versions of the trinkets to the game, and that requires a content patch. I don't know yet if that can happen in time for 6.2.1.