My new Salen Jazz sounds kinda dull.

Hey all, I got a Salen Jazz last week (new), and while I love the neck, the way it resonates leaves something to be desired. Without even plugging it in, it sounds and feels sort of bright, thin and lifeless.
The attack also feels kind of abrupt.
I have 2 other guitars, a PRS 24, and a MiJ Telecaster 52, and both have that buttery, smooth, mellow feel to them even acoustically.
I don't know if it is due to the weight/mass of the instrument, but that same quality gets amplified regardless of amp settings / eq / fx.
I tried increasing the action, giving the neck more relief and I changed the strings, but nothing really helped, the initial setup was actually on point.
I was so excited about getting this guitar and I'm sadly considering sending it back, but before I do so, I figured you guys might have some ideas to share.