Hi @droiddk
Pleased to hear you are regularly using FLX S24. There are currently no plans to change the "Fader Controls" functionality for Effect. Currently Fader Controls Effect allows you to crossfade to the recorded effect, by fading both speed and size. Without both parameters being controlled, you would not be able to crossfade to it.
We would like to add separate Effect Rate playbacks, to control just the speed or just the size of a recorded effect. This would mean you had a playback for the effect's intensity as you do now, and then another playback for speed or size. This would behave very similar to how the Speed Override control does now for adjusting effect speed, but could be assigned to a specific effect.
Edward