Hi there,
I hope a dev will read this, I fear that not.
However, I'd suggest to add a slope knob for the *attack* setting of each envelope.
Actually, the envelopes only have linear attack setting, which is quite outdated. A slope to make the attack "faster than linear" or "slower than linear" would have a nice effect on sounds. Nowadays I have to "fake" it with external tools, but c'mon, it can't be a long term solution!