For anyone else that needs a workaround (at least in Live) you can use clip automation too. If you map several parameters to a device knob, you can control the min/max amounts, so it's not much different than a sawtooth LFO.
From here, you can just draw your envelope to control that knob. You can also of course, control Mauls' parameters from clips directly too.
Don't forget to "UNLINK" the timing for "Region/Loop" -- that will allow you to use lengths of modulation independent of your clip's loop length for notes.
Thanks for passing this on Drew! And good luck to anyone playing with Maul -- it's a very sassy tool!