One thing the game definitely doesn't have is careful tuning. Submitted 10 minutes before the deadline and I didn't realize I wouldn't be able to make changes afterwards of course the alternative would be not submitting at all oh well. I think the rotator is potentially useful in the situation where there's so many adders and multipliers there's no hope of snaking a path through all of them in which case you would have two paths or more and then they use the rotator to combine the various inputs. This would happen right at the end. However due to the previous comment I have not had a chance to play test whether or not the cost of the rotator outweighs the benefit here. Certainly it might depend on the stage which actually is a sign of good design I think. If it doesn't ever, then bad design. ha!
I've already fixed a number of bugs, But I'm resisting really getting in there too deeply while it's still in frozen mode for the jam so that I can integrate useful comments like yours holistically rather than being pulled one direction than the other as different points are brought up. Such as: some people don't like the mechanic where you have fewer and fewer pipes to build with later on.