I get less reaction/response from the strings per level of effort when plucked as compared to my other basses. Not talking about tone or sound quality. Talking about level of and quickness of the attack of the bark per fingerstroke effort. Not as efficient at producing string sound as the others.
All my basses are passive.
Turning up the volume or changing pickup/pole piece height doesn't change it.
Same string sets on all the basses.
Two have hi-z humbuckers and the third has the Pbass split coil.
I even installed one of the hi-z humbuckers onto the Starfire and still get same result.
So perhaps it is a structural issue since it is the only semi hollow.
I don't think anything is wrong with the bass I would just like to pull more out of it.
We're getting closer. Some players talk about "digging in". They get something more from the bass. I can't quite define it but I think I get a sense of what you are missing. I tend to have a light touch but I recall a couple of comments. First is that if you dig in a lot or play with a heavy touch you need a higher action. That may be because you don't want to have the string hit the pickup or something else but it has been mentioned. Second is a recommendation for a long scale, i.e. 34". There is more string and more opportunity for it to travel.
I would consider raising the action on the Starfire and seeing what happens.
I would try another short scale, if possible, and see if there is a similar lack.
If you can get access to another hollowbody, try it.
If you are motivated I would pretend I was a slapper looking for a new bass. The buying advice should say things about solid vs. hollow, scale length and setup. If it is good advice for slap then it might help for mere digging in.
Pro Tip - don't try and slap on any Guild with the traditional bridge. There are stories about saddles flying off the bridge and saddles splitting.
It's a long shot but string tension might be a factor. If you have high tension string try and find a set of low tension string or visa versa.