While I have not had any major save bugs over the course of the games (besides not running into Nathaniel in DA2, even though I totally should have), I have heard stories of many people who have not been so lucky in the save department (the Leliana weird retcon aside). God knows how Inquisition is going to read those messed up save files. This does sound like a good idea, provided that the choices they wish for you to check off are very detailed. I think THAT is going to decide if this Keep is the better option. I don't know if they are going to present it like a comic in Mass Effect, but I don't really think so. Have a narrator like Morrigan or Varric with a bunch of options and you'll probably be fine. Don't know if it will go into the DLC territory for choices (like Witch Hunt), but I suppose they'll find a way.
Alternatively, if you lose your save files at some point in the future, better to have the Keep if you don't feel like going though all the games again. But still, how detailed the Keep is is the main concern here (besides the usual save transfer bugs, though more than likely minor). Overall, its a good plan provided it works really well, and you can't really fault Bioware for trying. I'm sure we'll find out eventually.
Alternatively, if you lose your save files at some point in the future, better to have the Keep if you don't feel like going though all the games again. But still, how detailed the Keep is is the main concern here (besides the usual save transfer bugs, though more than likely minor). Overall, its a good plan provided it works really well, and you can't really fault Bioware for trying. I'm sure we'll find out eventually.