I've always had this problem with the game since I defeated Ifrit (arguably Titan) in that the WoL is very 2 dimensional and that every problem seems to be solved by throwing the WoL at it until it dies. Although...
*spoilers for DRK storyline*
I loved the DRK story for actually challenging this trend and giving some morality to the players actions.
I do think that the scions care about the WoL as they haven't shown any evidence that they don't, but the player character really has no identity for them to even properly interact with these characters, which makes character building difficult.
As for Hydealyn, we are her champion, which naturally means that our purpose is to fight for her, though I think the relationship is a little bit like a mother and a child with the added bonus of destiny, rather than the WoL being treated like a weapon.