Not sure if this should be in specs or lore, I think it can be in both.
I think instead of worshiping human gods(I am a charr main, I do not like them ) we can have a more global system.
To solve the problem with the flow magic maybe some Tyrians become more godlike and have the power of a realm but I think/hope that every specs will worship a dragon. At some point in the story we could see the different races around Aurene. Some specs already have that included in their talents or builds. Dragons are part of the nature and some associations are easy to make.
We also learned some new possibilities in https://www.guildwars2.com/en/the-game/releases/september-04-2019/
Mordremoth : nature = ranger
Zhaitan : death = necro
Primordius : earth and fire = elem
Aurene : light = guardian (sorry for those dragonhunters like Braham who suddenly have to worship one but I think most of them like Aurene )
Glint: mist = revenant
Kralk : fury = warrior. I did not know that until the magazine said so.
Jormag : persuasion = mesmers
Deep See : Maybe thieves ? This one is hidden and mysterious.
Sorry for Engineers, right now I do not know what to pick for you.