Most likely answer - she follows the same path as Aymeric, Lyse, etc.. She'll be around and a significant part of the patch content but not as central as during the main MSQ, and then she'll pop up now and then in future expansions as a side character since we'll be elsewhere while she remains in Tural to be co-Dawnservant.

Edit: Adding my prediction now - the cabal on this forum will simultaneously gripe over her continued presence in the patches while also claiming "victory" for her gradually sliding to the background, completely ignoring that this is the standard treatment every character of her nature is given.