What you're describing is a lineboil, and it does usually involve redrawing, but usually a loop of 3 drawings per pose. Some people get away with 2 (Ed Edd n Eddy often stuck with 2-drawing lineboils) but I've never felt comfortable going less than 3.
A friend of mine does 2 and it looks fine to me, his channel is Jaggy Lines and opts for the Home Movies style of 'squigglevision.'
Although it's important to note that Squigglevision, Home Movies, Science Court, etc. all used a computer program to 'squiggle' the art and it's never great when a computer does it. Similarly I've seen some people in Flash just duplicate a keyframe, click on the art, and then click on the straighten/round button one or twice to mess with the line width consistency. That usually looks pretty bad and I wouldn't recommend doing it that way.
thanks for the brief explainer! I guess I'll try it out once I can figure out how to get photoshop to stop microlagging