I am using the mission expression pedal for morphing/pitch pedal/wah and especially on the pitch function i find it difficult to do exactly what i want because there is a slight delay from the moment i get the pedal to toe position to the actual time it actually calibrates and gets the pitch there! The rise and fall time when using the expression pedal can never be completely synced with the movement of your foot!
What i suggest is faster reading speed! As fast as possible to a point where there is no latency between your foot and the actual sound!