There's an important new menu option in firmware 1.7x that can help with eliminating clicks.
From the release notes:
"New MISC setting per part Envelope retrigger mode to choose between env restarting from 0 or starting from the last value it reached when voice is retriggered. Use the latter for notes with super short gates. This gives you the method of re-trigger in many, (but not all), older analog synthesizers".
So by starting subsequent notes at the same amplitude as the last rather than zero, the click from sudden change in amplitude becomes reduced or eliminated entirely. To hear the difference, try a single sine wave on unison (with 1 voice selected) and play short notes quickly (so that the next note is guaranteed to pick up the amplitude of the previous note), and toggle back and forth between the two Envelope Retrigger Mode options. The benefit becomes lessened as the number of voices increases, but that one of the tradeoffs of polyphony I guess.