Good tone from 0-10: easy clip-on mod

Stewart-MacDonald has been doing short videos of various things each month and I didn't get on this list till I ordered a phase switch several months ago. Some of these are very interesting and enlightening for the guitarists out there.
 
This particular one focuses on a non-intrusive tone circuit used to allow customers to evaluate tone before any modification is done. Very slick approach, and the focus is not to have the volume knob suddenly dig into the tone when it move from 10-0.
 
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That is a good question, and I think ultimately that might come down to appeasing traditionalists, both in appearance and performance. Many features require an "on/off" capability to them to achieve this, and folks do not want to buy an expensive guitar which has a different "look" than its predecessors. When I redid my guitar, I added 6 switches, but made painstaking efforts to "hide" 5 of them. Only one is visibly different from the original appearance.
 
Another part of manufacturing environments is that SPC (statistical process control) is the driver, assuming that A=B=C, etc. In this particular case I do not see the harm in that circuit being "stock," but others may. An interesting manufacturing point was brought up by the luthier who PLEK'd my guitar. When I mentioned Gibson PLEKing, he had said "Sure, they do, but with the guitars unstrung (not sure if that is true, or he meant "all strung with the same gauge strings"). Simply stringing them with your choice of strings/tuning can knock this off-kilter quickly, and I have re-PLEK'd very expensive, brand new Gibsons." The manufacturing aspect has to "assume" a standard, but not all fall into this mold.

I've a Lite Ash Tele that has a resistor/capacitor shunt combination across the volume pot from the (Indonesian or Korean) factory.

It kind of works to let more treble through as the volume pot's turned down, but to be honest I'm often inclined to snip it off and get rid of it. Adding more top as you increase volume can be very useful, unless you're the kind of player who sets the guitar controls to 10 and leaves them alone after that.

And it's a very bright Tele to start with, the last thing it needs is more treble all the time, especially when you turn the volume up to compensate for volume loss when rolling off the tone control.

The configuration would definitely come into play. I tend to use the volume knob very little and attenuate at the amp/interface. There was a point where I debated removing the volume pot completely (having read of some folks who have done this), but realized that has saved me more than once on feedback loops.
 
I do have a couple guitars with tone/volume per HB (the "4-knob jobs") with stock pickups that would most likely benefit from this, so may try the clip-on approach one of these days.

I would expect the modification's effect to vary from one pickup/amp combination to another, which is probably why some people like it and others do not, and why the presenter elected to make it a temporary try-it-and-see solution. 
 

The problem- the quest as a lead guitarist to define a smooth transition between back up fills and lead solos. 
I've tried this as well as every front end volume trick I could find. Volume pedals, Stomp boxes and yes using the volume control on the guitar. 
I use a none channel swicthing amp so I can't do that trick. But my conclution is the only way to keep the same tone and amount of overdrive is to change the master volume on my Princeton. 
Every other trick to lower the volume just kills your tone and sustain. 
So I'm looking into a volume pedal that takes over the amps master volume. SHouldn't be hard to do.