I find a cap only works well, it's the simplest and sounds the best. I used 150 or 220pf to maintain bass presence while turning down or 330pf to have it as bright while turning down.
Now I'm liking better just wiring the tone to the center lug on the volume pot instead of using a treble bleed. You maintain your tone as you turn the volume down but it's nice and warm.
On my Strat with the Treble bleed, you have to monkey with the controls to get the same tone I usually have always got just by regular adjustment..not the best explanation, it's all I got sorry.I don't see it as adding anything beneficial, but detracting from intuitive basic tone control.