We know whoever drinks from the Well is bound to Mythal, and during the meeting with Flemeth in the Fade, she uses this influence to control Morrigan or the Inquisitor. With no real specifics, Morrigan fears that following the battle with Corry, she may be called to do her mother's bidding, so that influence extends far enough beyond close proximity to even have one of the most willful characters in the series concerned.
Do we know how this ability to puppeteer the subject has been affected by the exchange between Flemeth and Solas at the end of Inquisition?
Checking the wiki, I was only able to find one note on Flemeth's page, near the bottom:
Designer notes on the post-credits scene indicate that Flemeth/Mythal knows that in his drive to restore the elven people Solas/Fen'Harel will kill anyone - even her. She intends to let him have her power, so long as she can pass the essence of her god-hood onto Morrigan. However, David Gaider has also noted that this is legacy information and may no longer be canonical.
Is there anything to yet indicate whether this means either the Inquisitor or Morrigan would now fall under the influence of Solas, with him having absorbed powers from Flemeth, or is there anything to suggest the legacy information regarding Flemeth passing her godhood onto Morrigan could still be a possibility?