I think each person's ears are tune differently, but for me unfortunately, I have to agree that JBL system isn't to my liking. My last car was a base Golf GTI 2019 and that sounds better than this JBL systems.
BeatSonic amp does help, but I am hoping that more plug and play (without cutting stock wiring) will flood the market soon so we will have more options to choose.
The Taco's JBL sound system is just OK IMO. It would be good as a standard system, but for an upcharge it is pretty disappointing. My other trucks with JBL were much better although definitely too focused on the front center speaker.
I bought a Beat Sonic amp, which gets good reviews and will have the time to install it in a day or two. I don't expect any miracles, just an improvement while I wait to see what to do. I played around with the limited soundfield controls they give you, but everything I tried seemed to only make the sound worse.
I am leaning to @Vidman's solution of ripping it all out and putting in a real premium sound system. My Pro is just too nice a truck to have a mediocre sound system IMO.
Get the sonic beat amp booster. It def makes a huge difference. I also boosted bass and brought down the highs and mids just a tad. Also might make a difference turning off the noise cancelation in the cab and the engine sounds with a carista. I've had mine off for a while but I think I'm going to see how it sounds with it on again just to see if it actually bothered me.
I went to Beat Sonic a few days ago in La Mirada and they installed the amp for me. Dramatic increase in sound and volume. The guys were friendly and did the job in less than an hour. I'm very please with this upgrade. This is what the JBL speakers need.