I'd be okay with the Warden never appearing again, so long as the events of subsequent games aren't events that should involve the Hero of Ferelden. That was sort of my complaint with DA:I regarding the Warden. Your main villain is a darkspawn bent on repeating the folly that may have created the Blights, using blighted lyrium as a weapon, and he's caused some sort of false calling that is causing the entire Orlesian chapter of Grey Wardens to self-destruct. Events that should be of great concern to the Hero of Ferelden were written into the plot of DA:I, and yet the Hero of Ferelden can't be bothered...he heads off on a persona quest to save himself like a selfish craven.
The Hero of Ferelden, if living, should have been at Adamant instead of Stroud. Stroud should have been the replacement if the Hero of Ferelden was dead, and Alistair was king.
Now as we move into DA4 it seems we will be having other events that should be of major concern to the Warden, with something bizarre going on at Weisshaupt and perhaps infighting within the order. And yet the Hero of Ferelden can't be bothered it again...it will be up to Hawke (who isn't even a Warden) or Stroud to sort out.
If the Hero of Ferelden isn't going to reappear in the games...stop writing stories that should involve him or her.
This. So much this.
As soon as the game started and I learned the world is going to ****, the first thing I wondered was "Where is the Hero of Ferelden?" Not because I have a burning desire to see the HoF return to his/her usual glory, but because it seemed like the most logical course of action for the story to take if The Warden is alive. Regardless of how much of a jerk the HoF may have been in the earlier games, one thing is always consistent across every playthrough. The HoF is the resident badass in Ferelden, and he/she isn't the kind of person to just roll over and let the world end without even trying to fight back. Even more so if the HoF is in a relationship with Morrigan / Leliana, and especially if the HoF is the king or queen of Ferelden.
As many forum members have already pointed out, bringing back past love interests and companions did nothing but exacerbate this already obvious problem. Seeing Morrigan on screen with her son, and without the HoF was ( in my opinion ) one of the worst moments of DA:I. The Inquisitor had no reason to be in the fade with Morrigan and Kieran since the character literally has zero emotional investment in the situation. That scene could have been an absolutely fantastic moment with a HoF present who did battle with Flemeth in origins. What a wasted opportunity on Bioware's part. Hell that could have been a perfect opportunity for a HoF cameo if and only if The Warden is alive. Sensing Morrigan in distress in the fade ( due to the ring she gives him in origins ) and coming through a different eluvian to find the Inquisitor, Morrigan, Kieran, and Flemeth all in the same place... that's the kind of drama i'm used to experiencing in Bioware games.
The same can be said of Leliana and her emotional turmoil she experiences while being the inquisitions spymaster. The emotional investment for the Inquisitor vs a romanced HoF is night and day. The Inquisitor just doesn't have as much of a reason to give a **** about Leliana's personal problems.
The impression I got from inquisition is that the story and the protagonist were weak. So weak that it was necessary to include old companions in order to carry the game and attempt to give the player a reason to be emotionally invested. This should not be the case ( and is one of the many reasons the new PC every game idea sucks ). The PC and new supporting characters should be interesting enough on their own that any old companion simply serves to enrich the experience, not support it completely. I sure as **** didn't care about my nobody inquisitor in the beginning of the game. I was more interested in seeing what Leliana, Cassandra, Hawke and Varric had to say about Corypheus. If we as players had been provided with an origin section of the game...a reason to give a **** about the inquisitor...then there may have been a warmer reception for the new PC. As it stands now, the game haphazardly thrusts a new PC in your face and then begs you to accept the fact that he/she is awesome every chance it gets.
I've been avoiding responding to these threads since I don't want to go off on a tangent bashing all of Bioware's decisions, because I really do enjoy the franchise regardless of the disorganized delivery we seem to get as time goes on. What I really want Bioware to do is make a quality game with the characters they have introduced into their world of Thedas. This extends to player created characters as well. If the story is going to have an affect on said protagonists life, or the lives of the people most important to them...at least have the decency to include them in the story, and not just to kill them off. The sidestepping just makes Bioware come off as lazy. I like the idea another member posted about controlling different PCs in the same game in order to tell the best story possible. That's a solid idea.
Dragon Age: 2, for all the complaints it received did this ( standing alone ) pretty well. The story ran alongside origins, so there was no question about what the HoF was doing if he/she was alive. When the story advanced, the main PC and companions had become interesting enough on their own that the HoF's presence wasn't required in order to advance the narrative, or for the story to make sense.
It also helped that all of Thedas wasn't in danger of being razed to the ground by a darkspawn magister hellbent on attaining godhood. The only way the omission of the HoF in inquisition makes sense is if The Warden is dead.
Anyway this analysis is purely my own opinion and is completely subjective. However I do feel that some of the things I touched on have plenty of merit to them.