You might be able to if you modulate whatever is controlling the envelope amount (osc volume / enevelope amount / routing amount) by a sawtooth LFO in ENV mode, the top graph can be acheived with positive LFO routing and the bottom one can be acheived by negative routing. But I'm just saying that for the sake of the argument. It's obvious that the more parameters we have, the more LFOs we can free up for more useful tasks.
You know what I'd like to have? Instead of ADS for note on and R for note off, I'd like to have ADS for both, or at least an ENV LFO that can be triggered by a note off.