Sprint Ability

[NoctisUmbra]

Sprint is fine, but instead of draining all your TP instantly for a duration based on TP consumed/50, it should just drain 50 TP per second while you are spriniting and stop when you used the sprint skill again or stop moving..

Pretty sure they thought of that, and preferred the current way so that it's not feasible at all to use it in battle scenarios. A drain would make it possible to use in battle. Full TP consumption makes it a no-brainer to never use if you expect to engage something soon.