Add Envelope Generator/Follower to Filters

What is the problem?

Filter effects are great, but best implemented with sequence or expression pedal. Need to be able to react to performance dynamics as well.

What should this feature achieve?

Limited extra knobs for filter, so add shape and EG/EF options with short/long shapes in lieu of fully programmable envelopes.

Are there any workarounds?

Any links to related discussions?

Any references to other products?