So I recently got my Father to play this game. To make a very long story short, his eyes aren't as good as they used to be. He is however, and avid MMO player and Star Wars fan (since before I was born). Anyway... he recently asked if the game had a feature, which it does not. And the lack of this feature, is starting to anger him (I think, understandably so) to the point of not wanting to purchase the game. (He's still on his free trial.)
The question he asked was something to the effect of "Can I increase the font size during conversations? It's too small, goes by too quickly, and I cannot read it." And I was a little embarassed to say "No, sorry Dad... They didn't think of that one." The issue it seems, only gets worse in environments where characters only speak Huttese or other Gibberish languages - when he's being forced to rely on subtitles, which he can't read, to know what's going on.
The solution however, is simple, and already presented: Give the user the ability to increase the font size of the text during Conversations.
In the meantime, in those situations, I will advise him to spacebar through the conversations - and read the Quest Log afterwards.