I just finished Legacy. And all I have to say right now is: wow and also this. Thanks for this great dlc.
The ending with mother was touching as was my conversation with Bethany, my sister (in the game) after completing Legacy. When I talked to Larius I got a little worried, especially since he said something about 'freeing him' and 'only I could have done it.' Foreboding for darker times, maybe.
The fight with Corypheus itself was - challenging, interesting and good ol' plain fun to do. And kudos and praises must also go the the cinematics department for the finishing cinematic cutscene in this fight. The finishing move when my Hawke finally finished Corypheus and kill him or does he? The cinematics in that scene was very well made, I find

- and to me, probably the best as of yet.
My time clock showed 100 hours before I started Legacy and 118 hours after I was finished. This also included running around (like a chicken, I think) to find the helm of the fortress, numerous tries to get the power nexus correct. Yaah for Youtube here....but I digress.
The final level of the dlc, Legacy was also great. I'm talking about the level 'the final seal' where we meet Corypheus and defeat him. (at least for now, it seems) Like I said, the fight was challenging, both tactical and strategically. And I liked the labyrinth that suddenly came up - and at least know we know that he is a conductor of the elements. Ice came tumbling, so did fire and electricity and he also has the ability to manipulate the Earth itself, it seems. Great fight and varied, too.
When he (Corypheus) first awakens he is very confused and thinks he is dwarven lands. Great touch, btw.
And the whole golden city that was black already when they got they, maybe, also a great touch, I find.Varric's telling of the tale, especially how he ends it by saying 'allow me to take a liberty of two' mirror the whole unreliable narrator back to us, the gamers, the fans, I think.
Please continue in the same way with other story dlcs....
I almost forgot to mention the voice acting of Corypehus; stunning and great as always.
Another thing I need to mention, I feel is the way this -ahem- creature, monster, person?, looks. It really fits his voice and his appereance, both mentally as well as physically. We're not left unsire about that here we have a really, really powerfull -ahem- creature....that ends up conducting all the elements.