Whatever the elven Inquisitor did , I imagine it won't matter much.(for practical annoying reasons , Wycome as an elven city state doesn't matter , it's not recorded in the Keep .Could be added later though)
And anyway it seems the action will go north , there's a huge population of elven slaves , where Dalish don't go and don't spread tales of Fen Harel :Tevinter!
Elven slaves and probably elven artifact the magisters of old stole from ruins , Solas's future favorite candyshop!
And now go there as the Elven Inquisitor and try to convince those slaves you're a better solution than Solas.
You're not.If the magisters (and their fondness for slavery) fall , the Qunari will get a foothold in the north.
An slave uprising right now would be terrible .
Besides the Inquisitor doesn't even have the force of the Inquisition behind him , it's disbanded or in service of the Chantry.
So you'd need an official call to arm from Divine Victoria , also not happening.
Solas has the "A Wizard Did it" thing going on , he wants to blow up the world , he doesn't need to be subtle .He doesn't matter if he opens up a way letting Qunari invade later , there won't be a later in his scenario.