I might have nmisunderstiid what you actually meant so i want to ask. You say that at a strength of 5, manipulation should be half from where you started the cursor to where you ended. To me it sounds like when you start a stroke, the end should be half the size of the beginning which is not correct. If you drag out abit further than in the video, you can see there is a larger decrease from start to end. This makes me think that the statement should be more like this "the effect of manipulation decreases at a continues rate of about 50%
Am i onto something here or am i missing something?