I added that the two could have formed an alliance. After all the ruler wants that boon to show the world that elves and humans can live together in peace.
An alliance between the Hinterlands and Redcliffe doesn't require the Dalish to lose any degree of control over the Hinterlands. The Dalish Boon is about giving the land to the Dalish, which is why I spent the time getting the specific dialogue and pointing out that both versions address that the ruler is granting the region over to the Dalish elves.
Even the epilogue slide addressed that it was land for the Dalish: “In time, many of the Dalish clans moved to the new land provided for them in the south near Ostagar. Wary of their human neighbors, however, tensions soon rose again... and only Keeper Lanaya's leadership kept peace alive.”
I'm trying to offer you explanation of the Dalish actually still having the land instead of it being a retcon, so the opposite of me having a problem with them having land. Though with your attitude, I see I needn't bother. 
So far, we haven't seen anything to indicate that there's a different version of the Hinterlands for players who chose the Dalish Boon, and as someone who had selected the Magi Boon with my canon Warden and saw it handwaved, I'd rather not see players have to deal with it; it's more than a bit irritating to see your choice and it's consequences rectonned.