However, Maths has better uses than envelopes, and the FH-2 isn't really built for instant tweakability. I'm starting to feel the need for one or two simple ADSRs for melodic stuff.
I've been really digging the depth of my Mutable Instruments units though and though my current needs are simple.... it might be a good idea to find stuff that has more possibilities to explore

Both Mutable Stages and Streams can do what I want (I think) and then some. Or I could just add the Doepfer A-140-2 Dual ADSR or two 2hp envelopes.
Any other modules to look at? And what would you choose between these?