3s on 14T pinion is slow but enough for practicing. Maybe it's only meant for track running newb like me. Bashing on it isn't any fun. Full throttle hardly brings the nose up when jumping. At most it still keeps the car level. If you jump with nose down you are unlikely to bring it up soon enough. At least I can't. But I am very unskilled so you may try it yourself.
Recently I changed to the 16T pinion and with it 3s isn't that slow anymore. I even ran 3s on grass for bashing today. But after running 4s I don't think I will go back to using 3s for bashing anymore. So for me, 3s on 16T is now only for track running. You're never going to worry about the temperature on 3s though. It's still quick and responsive on track.