A Super 4P5T switch will let you switch the tone control so it works on the bridge pickup while being disconnected on bridge+middle for maximum cluck and sparkle....
I'm aware, and as I said, I think I have some of those.
TBH, I'm being a gun-shy coward, after a recent bad rewiring experience.
My other guitar is a homemade bastard child with 3 old SD humbuckers and extremely complex wiring, using an 8-pole 5-position switch, 78 electrically distinct pickup combinations.
It's actually really simple to understand and use, but it's a serious pita to work on, tons of connections in a tight space.
It originally had a single tone control, and I wanted to add a second one, active only for the bridge pickup when it's all that's on.
Long story short, I broke shit, and it's really hard to fix it.
I'm not even sure exactly what's broken, but I think some of the traces on one of the traces on one of the pc boards used in the switch may have gotten overheated and come loose from the board, maybe need to replace the switch.
I have a replacement, but 5 positions x 8 poles is a lot of connections, physically awkward to work on, ugh.
I've been building and rewiring my own stuff since junior high school (long ago, trust me...), but I'm suddenly reluctant to mess with a working mostly stock, medium expensive EJ.
I'll get over it, probably, but mean time, I'm just playing my EJ, and looking the other way.