@Catmander Neko.5643 How about adding a stop gap solution to the aurora, vision, coalescence that puts the player in charge of what they want to show?
Can you remove the stacking buff effect from the trinkets and allow the players to select which one they want by adding the buffs to the vendor (same that will exchange slumbering trinkets for awakened ones). In the same way that the guild hall buffs work, where you can choose one option and it's an everlasting buff. Make it so you unlock different tiers of the buff to be "purchaseable" depending on how many trinkets you have unlocked, and add a remove buff option on the same vendor tab as well.
While it doesn't allow the player to change it on the fly, it gives us the ability to decide which effect to display if any, and it can be freely controlled by the player on a per character basis, as is the case with the wvw and pvp trinkets. This vendor tab can simply be removed in the future once the work is done to put the change on the hero panel trinkets.