Yeah, maybe another stomp switch mounted board. Probably dual op amp for the dry side so you can select inverting or noninverting. Wet side often doesn’t need a buffer since many pedals have high input impedance. But there could be a switchable bjt buffer that goes before the board input. I say bjt because it’d probably be smaller than another op amp, and with the smd jfet situation being what it is, I’d prefer to just use a bjt where possible (I think bjt buffers sound just as good).
The for pedals with fewer than 6 pots, you can place the clean blend pot (with lugs) bear the other knobs. Maybe us lug pots for one or two other knobs so you can reorganize the layout.