It's weird that the Wardens would let Fiona and the HoF leave like that just because they are cured. They still know secrets of the Wardens and I honestly expect they would try to silence anyone who could blab those secrets.
Fiona maybe, but I'd like to think they have enough gratitude towards the HoF that they'd let them go without hassle.
If they do have a problem though...let 'em come I say. If they find the summer home in Antiva, or track them down on their adventuring, they'll have two of the most efficient killers in Thedas to contend with. :S
As much as I love many of the characters, I personally wish they would stop bringing them back. It creates too many problems for them, story-wise, because they have to keep adjusting to accommodate previous story choices by the players, or else ret-con them, rendering those choices meaningless.
It's one thing if they set it up carefully. It was always pretty clear that the player would not know whether they had truly killed Flemeth. Not that I was happy with her appearances in either sequel, personally, but it fit with whatever choices the player made in DA:O.
I understand the desire to keep bringing back good characters, but giving multiple potential fates was always more interesting and immersive, to me, and I wish they would allow for that more.
I sort of agree, I suppose. Part of me wishes the Leliana romance epilogue in DAO wasn't tampered with as much as it was. I wasn't particularly overjoyed to see her in DA2, and kind of be left in the dark about the Warden for years.
But DAI made that a bit better, and squeezed in some decent character development for Leliana to boot. Wasn't all for nothing.
Hopefully that's the end, though.