If you want more treble roll-off available on your tone pot, double the value of the capacitor attached to it. If that's still not enough, double it again.
If you feel you're missing treble content before you start to turn down the tone control, replace your 250k pots with 500k pots.
My current Squier Jazz has 500k pots and a 0.1uF tone cap, plus a series/parallel switch for the pickup phase. It can do typical Jazz sounds and can also turn into a full-on dub machine just using the onboard controls. The replacement electronics cost me a couple of quid.
So how expensive is this thing that has its own promotional video?