I'd like to echo the request for unison detune like the P5/10 have - hold unison and press program select buttons to set levels of detune.
I like to use the unison button like a sort of "solo" switch and the vintage knob is never in a good spot when used this way on this synth. Also, even at maximum it can't detune as much as a Take5 or Rev2 can - and it isn't really enough detune for me.
I figure if the P10 can have this with the available buttons, why not the Trigon?