You do know that you can romance Sebastian in Dragon Age 2; this won't lead to a sex scene since Sebastian is chaste an only wants a platonic romance i.e. without sex. As for MotA, I haven't formed an opinion yet as I haven't played it yet. However, judging from the Bioware boards on DA2 and also from the reviews from sites like IGN and Gamespot, they like it.
People seem to fortget, I think that yes, the basic game will still be the same, meaning that the fast combat remains, the wave combat will still be there, although changed a bit, so it makes more sense to have re-inforcements appear during combat.
As for Felicia Day, it is not fair to just see as nerd-gasm for Bioware fan-boys; she's actually a big fan of the DA franchise. And can you really blame her for doing her thing e.g. using the DA2 game to market herself? I certainly don't.
As Leliana and the ending cutscene, where Leli speaks to Cassandra about the Warden and the Hero of Ferelden, David Gaider did explain that there was a reason for Leli not being dead, if the played did choose to kill her during the Sacred Ashes quest in DA:O. Meaning we'll get an explanation for Leli being alive...sometime...