Lots of articles available to read if you want to educate yourself on why BIG brakes are on performance or track vehicles.... it's mostly due to heat dissipation. Us mortals usually do it for parking lot points or out of believing hype. It's always awesome to talk about your 8 pot calipers with 15" rotors or whatever. Bigger parts allow more heat dissipation. that's about as much as I can simplify it.
Change your pads, use cross-drilled & slotted rotors, use engine braking in conjunction with your brakes.... all that should be more than sufficient to address your current fade under street driving conditions.
This is only my opinion, and I drive daily on OEM pads & rotors.... even when I tow... so take it with a grain of salt.
I don't tow with the car. I tow it behind trucks I'm delivering. I have to carry a lot of extra weight in it. That's why I need the added heat dissipation from bigger rotors.
I always get slotted and cross-drilled rotors, too. I've seen the real-world testing with the individual variations of each and together.
Slotted rotors peel a hot boundary layer of gas and dust off of the rotors, which dissipates the heat more quickly. They stop faster because if that, but it's the heat dissipation part of that equation I'm interested in. That's from real-world testing by independent researchers with no bias.
The cross-drilled rotors mostly just help with rotor weight, counter-balancing a bit of the extra brake material from the added diameter. I like lighter weight especially since my car has so much extra weight in it. It's minimal, but it has a greater effect since it's unsprung rotating mass.
I appreciate your willingness to respond. I'm newish to Jettas, which is why I'm asking these questions. You guys know more about Jettas than I do. I've been familiar with the science of this stuff for a long time, though. And I drive my car like I'm at the track probably at least once a day. There are some good roads and turns where I live. I'm very hard on it when I do that, like power-drift hard. I know I shouldn't be doing that on the street but I know how to do it safely. It's second nature to me. Heck, we have far more right turns/exits than left, so I have to replace the tire on one side of my cars twice as often as the other side's tires. lol When I at the track (or Karting), if I'm not at the top of my run group, I'm usually right behind the top guy and it's usually because he has a really great setup and more power. I'm not bragging--couldn't care less about that. I'd much rather have guys beating me for a good challenge. I just mean I really enjoy this stuff and I know a lot about it. I don't know much about Jetta mods though and I didn't want to break the bank unless necessary.
Seriously, though, I appreciate your input. Very helpful. Opinions are useful when they differ.