I just wanted to say that we're given enough lore ammo in DAI to be able to legitimately disregard the Mage path's 'time travel' as time travel, regardless of what Dorian and Alexius thinks.
Portal is like a portal to the Fade.
'Fiona' in VR can be another demon.
The magical expectation is of time travel, making it happen (willpower).
A world can seem like real - Solas conversations prove this.
Inquisitor has the Anchor allowing more physical travel to/through the Fade.
Everyone involved can think that time travel is what happened, enemy and ally, while it can still just be more of a pocket Fade realm.
Thank Solas for leaving this possibility open.
Maybe there's holes in this idea but I just wanted to post this.
Personally I like to think its both true and untrue. I don't think we we need to think of time as normal when it comes to the fabric of reality in Dragon Age - just DAI is what starts to focus on this in the context of 'time'. Every being in Dragon Age existence may be 'living a dream' of sorts, so I'm not bothered by the inclusion sometimes of weird offshoot 'dreams of reality' that we can call 'time travel' - effectively such to the people involved with it (Dorian and Inquisitor).
I think 'time magic' basically 'hacks the world', letting one go into the known past, or more unstable, letting one go into an unknown 'future' sliver of reality. It doesn't need to be understood as time travel in the more mainstream scifi view, or even 'time' travel at all.
Thedas itself may be considered a dream of the Maker.
http://www.gamefaqs....sition/70951643
There are different points of view you can take on all of this, and I really think this is by design. You can decide how much of 'magic' and 'thought' and 'time travel' is happening.
To those who don't want time travel in their Dragon Age game, you therefore have an 'out'. Just disregard some of the (biased) lines of some characters and believe that 'time magic' is an elaborate magical illusion and only Thedas-as-we-live-in-it matters. Inquisition is just the first DA game to significantly push on the boundaries of what we consider 'reality' in Dragon Age so its a harder path to take when experiencing the plot.
But always remember oh-so-smart Solas' lines after the mission - did you really time travel? Well you at least sorta did, but you as the player can decide how much. 'Temporal disruptions' from rifts can even just be understood as just more wacky magic at work, not 'temporal' as we centralize time on Thedas.
When you get into concepts of 'dreaming', things get kinda complicated.
TLDR: Believe what you want, just take the info presented to you at least. That's not just for this time stuff, but everything. Justinia, Chantry, Elves, Maker, Technology, everything really. You're to question things to some degree, since Dragon Age as a series still has a while to go.
EDIT: Even the weirdness of Fiona/others(? I forget) being foggy about Alexius can be explained by either Time Magic or Blood Magic. We're not allowed to know for sure. Alexius does use Time Magic, but we don't know whether it mattered in this case.
EDIT: While I think things like 'The Breach' won't happen again or at least be as important, I do think the Veil will thin/be 'removed' in a way in the next game or the game after, bringing more 'time' stuff to the forefront but in a longer-explained and less-quickly-drastic way than the Mage DAI quest. We'll be given more material to work with then, but IMO we'll always be allowed to think 2-3ish major but conflicting things about it. If you don't want time travel in your Dragon Age, I think you'll always be able to legitimately consider it 'just' a spell that simulates the conditions of 'time travel' (in a more definitive sense), but doesn't 'truly' do it.
Still always messing with the fabric of reality though. But whatever - the Fade both establishes and changes all the rules as we know them or come to know them. DAI only fully slaps us in the face with the truth (taken one way or another) that Thedas is not the only important 'location' to care about. Hate the Fade stuff in DAO and DA2 all you want - the Fade matters.