This looks fun, but I would definitely consider adding more function generators. Pam's + Stages is a great start, along with the Disting EX... but I would add at least one more dual or quad function generator. Maths, Quadrax, Zadar, etc.

Given the oscillators you have, you might be fine with one filter. Plaits has a LPG built in for many of its modes, and Rings gives you plenty of control over timbre as well. Plus you have the Disting EX, which can provide a second filter if needed.

And seconding the recommendation for some sort of switch or similar utility.