Yeah, we see this fatigue during the 5.55 trial, while the feat he performs during it is pretty impressive, he then immediately takes a hit and is down for the count, while the WoL often is asked to do things back to back, like how we gave away large amounts of aether to Aliese and then had to be the last (wo)man standing during the tempering trial.
It's also worth noting that when our Allies like Estinien go all out, it's often a one off show of might, they do it once and rarely are they asked to do it again right after, whereas our WoL on the regular goes from leading front line charges, to taking down weapons, to liberating castrums and soloing primals and the only rest we get in-between is "well you've got time to walk rather than run to your next objective, yay...!"
Edit: Also curse cutscene incompetence, I know other characters suffer from it, but the WoL... I swear the lacus litore end cutscene... I have been mad about a lot of things... but I don't think I will never not be mad about that one... never have I screamed "SHOOT HER!" more times internally than that moment and I was a DRK, I didn't even have a gun, but I can still throw darkness, hell I would have accepted throwing my damn sword at that point... ahem... I know we can't do much because we can be any job and taking future jobs into account that's a lot of animations. But with all the Azem stuff just give me some generic WoL/Azem powers in cutscenes and free me from my lemon status, sorry, rant over.