Dragon Age Keep: Update, Replace, Ignore

The thing is those in the south in official positions of authority are going to have their hands tied by the Llomerryn Accord. So they can't get involved in the Tevinter/Qunari war without breaking that agreement. Since Par Vollen are steadfastly maintaining the current invasion is none of their doing and the Antaam have gone rogue, even if the conflict spills over into Antiva or other nations adjoining Tevinter, those from further south might still be loath to get involved, without a specific request from Tevinter, who are probably too proud to ask for it. This scenario is based on what we have been told in Tevinter Nights concerning the relationship between the Antaam and Par Vollen.

By contrast, if you go by what we are told at the end of Trespasser, the invasion of Tevinter does have the backing of Par Vollen because, if you were in an alliance with the Qun and hand over the Inquisition to the Divine, the Qun approach her asking for an alliance against Tevinter. No doubt they justify this on the basis of the original agreement, which was to prevent the spread of red lyrium. The epilogue left it open as to what the Divine's response would be.

Now they could run with either of these or a combination of the two. However, any decisions and involvement could simply be conveyed by codices, which alter according to who is in power in your world state. There is absolutely no reason why our PC would need to travel to these nations and meet them in person, any contact being made by their agents in the north. This can apply equally whether they are responding to the conflict in Tevinter or getting involved in the hunt for Solas. However, in the case of the latter, secular power is not really going to make much difference. Solas is not amassing his forces for open war but operating in the shadows.

This is why Charter was focusing on getting intelligence from the principle covert organisations across Thedas. What seemed odd in that story is that whilst she explained the absence of the Sicarri and the Ben'Hassrath from her meeting, she made no mention of the Crows and no one else queried their absence either. It may be they were too focused on dealing with the Qunari threat but you would think it would at least be mentioned. Still, unless all the concept art of Crows was about content related to the now defunct multi-player element, it would seem they are going to feature in the action.

Anyway, so far as the Keep is concerned, I'm fairly certain the majority is only going to be relevant to codex entries about the situation in the rest of Thedas and the odd line of dialogue. For example, an agent of Ferelden would merely have the name of the monarch altered; ditto an agent of Orlais or a reference to Orzammar. Our face to face encounters with rulers, if at all, are going to be with the Archon, the Arishok or the ruler of Kal-Sharok, all of which are from the northern part of Thedas.