Regarding the "love is simple..." thing: yeah I found it a little off at first. But in context I guess it made sense. She's just lost her mentor/saviour/mother figure, and the Inquisitor does ask in a pretty cringeworthy way. :s I'd assume that such rumours about her and Justinia were common, too, given those gossipy Orlesians! What I think she was really doing was railing against the idea that romantic love is seen as the be-all and end-all, but maybe that was just my interpretation.
I think Leliana and Morrigan are both beautiful in this game. Time has taken its toll on Leliana more, but she's still got it. I've always seem Leliana as a few years older than the Warden, perhaps even a decade, so that would be part of it. I assume Morrigan to have been around 19-20 in Origins, same as my Warden, whereas Leliana I saw as late 20s. PLEASE don't anyone kill me - I know what the toolsets say, but it's open to interpretation.

Just makes sense to me given Leliana's pre-Origins past.
Am I the only one who thinks the "hardened" Leliana was a bit too ruthless? Yeah I get it, she can be hard and do what she needs to do for the greater good. But she's always had two sides to the coin - sweet and caring devout believer versus hard, calculating bard. Her post-Valence speech when hardened was a bit scary though. :-/