Re: Difference between .022 and .047 Orange Drop caps?
With capacitors they work two ways. 
When turning 10 to 0  ,  0 being the effect completely on 
47nf - stronger treble cut
22nf - weaker treble cut
the smallest I'd use on a guitar depending on the pickups is 10nf, the highest is 100nf. This is on a passive guitar. 
however still at 10 the guitar still cuts some frequencies. This is basing it upon modern wirings of course not 50s. 
47nf - warmer even at 10 
22nf - slightly brighter and less compression 
With capacitors even the import ones have gone a long way. Such as those green polyesters every guitar wiring "expert" tosses in the trash. The only bad capacitors are Ceramic and MLCC in my opinion. In a passive circuit there is not enough electricity or heat to justify anything "hifi" in it. 1% tolerance (high accuracy) capacitors for instance I would only use in tube amps or hifi audio equipment. It's cheaper and easier to just use significantly different capacitor values than it is to go with whatever all the cool kids are suggesting like paper in snake oil. 
If people want more brightness
stainless steel strings - Ernie Ball , Fender , Dunlop ..etc have them 
a blower switch (ON/ON DPDT mini toggle or push pull wiring mod) 
trying different picks - Graphtech Tusq "bright" or acrylic picks by this or that company which acrylic picks are expensive 
adjusting your pickups pole pieces
if people want more warmth 
pure nickel or other strings on your favorite string makers chart that promise more warmth
thicker picks - Dunlop gators 1.5mm I had a great experience with. Some guys who like their strings flappy will scoff and say those are rocks. 
this is the best video I've seen about pots and capacitors how they affect our tone