I think I should have worded that better since I'm surprised both of you latched on to that comment
I know that choice is already there indirectly given the sibblings fate tile is there and it would be pointless to add "did you bring anders?"
My point was more aimed at not adding choices that only seem to benefit emotional impact for sake of "making the keep my own" vs. making the keep for the good of everyone. Every Keep choice should have potential to be mentioned, have some quest about it later on, or impact the world. Allocating resources and time and what not.
In an ideal world, sure, I'd be great if every decision that could possibly come to something was tracked "just in case". However, I feel there's a limit beyond which things start to become just so much extraneous minutia, to say nothing of impractical to implement. Just from an end user perspective; as it stands it already takes quite a while to set up a fully custom world state. Going into further detail would run the risk of flat-out boring the user.
At the end of the day, there's no telling what little decision may make it into future games (we can only assume that everything that can effect DAI is already in there) because those design decisions are yet to be made. I think this is why at this stage they seem to be basing what new flags get added on volume of requests and forum polls. When you get down to what is effectively narrative triage, the deciding factor really should be which flags most people feel they have agency in and most importantly: why?
For example, while in theory a flag could be created so that in (for the sake of argument) 'Dragon Age 5' there's some reference to or long reaching repercussions of that band of Tal-Vashoth mercs The Warden wiped out (or not) on behalf of The Crows, I can't seeing many playing having much investment in such little incident, so there's little sense in preserving it. Which really applies to a great many sidequests in both DAO and DA2...and almost certainly DAI too.
Short version: player agency should trump plot contrivance every time.