Generative assets in the concept stage is a lot more insidious than people think. Even if you eventually swap to human-made assets, you're going to be comparing them to your generated ones, and their job is to 'finish' the computer's visuals rather than develop an art direction.

If you want something to look smoother, start with the motion, not the frames. More frames will only enhance an already smooth motion, it will not make something smooth. Focus on the minimum amount of frames to actually make the animation legible and work from there.