Assume a perfect mechanical device and zero latency processing subtitles.
How important is it that movements on screen translate 1:1 into a movement of the interactive device?
Is accuracy in terms of intensity more important than accuracy of movements?
Also, are there any women here? Or people that use intensity based interactive devices? Should scripts for those devices be different or is it safe to assume max penetration depth = max vibration intensity?
Go to this link and read the section about Stroke Length and Scripting and Tips & Tricks. There you will get some answers I think. It was written pre TheHandy and Kiiro, but it should be relevant for the most part.
Talented scripters don’t need to stay 100% accurate all the time, some on screen actions don’t translate well to just an up/down movement. Some of my favourite scripts involve things like “vibrations” when a girl gags during deepthroating, or a quick stroke that’s technically too deep when she kisses/taps the dick. They work very well and I feel it allows scripters to add more of their own artistic flair
timing is very important that has to be as accurate as possible as you will immediatly notice it when it is 2 or 3 frames off.
But with the stroke depth and direction you can play around a bit to what you like especially if you create a script for yourself.