I've just realised that animations are set in frames per second and locked to maximum 60 FPS in construct 3
in normal cases I suppose you would have to be a masochist to want to animate above 60FPS in 2D
however if you had a game with an extreme slowdown feature you might want more than 60FPS on some key aspects to avoid choppy animation in the slow-mo phases.
and, as discussed elsewhere, as higher than 60FPS frame-rate hardware is becoming more common some users may want above 60 FPS animations for ultra smooth animations. (especially as you can get something like Spriter to chuck out the frames for you.(assuming it will output more than 60FPS)
so may be worth increasing the FPS cap on animations.
Ashley just throwing it out there