So, as much as I like DAI I have to agree to some degree (?) that the final battle comes to quick, and is over too quickly as well. At least Cory was at the same level as me, nice change.
Yet I appreciate the setup, the floating castle is kinda cool, the dragons battling while fight Cory is nice, and yeah, it is okay-ish, but again, too short, and not that satisfying. In fact I was under the impression that we are in for a Haven 2.0, with the party going on and BAM Cory returns from the fade when I return to my chambers.
And though I HATE to be the one to say it: In DAO, with first Redcliffe under siege, and then storming Denerim, with the army all around, and then Fort Drakon, it was a little bit more on the awesome and dramatic side.
Final battle should have taken place in Skyhold. That should have been the place that got lifted up towards the breach (and before that you would fight the actual siege against remnant templars, demons etc). And while Skyhold tears asunder (and afterwards is "magically" returned of course) you fight your way through your shattered homebase, towards Cory!
Alas, it is as it is, sadly. Its decent enough to me, but I see a lot of wasted potential.