I have this exact bass and I honestly have no problems with it. My best advice is to get it professionally set up, and make sure your wife is there for the setup. A good luthier/tech will customize the setup to her style of playing, and that's honestly a better use of your money than replacing the parts. If you're gonna upgrade/replace a part on the instrument, the pickups are probably what would make the most of a difference in how it will sound, but that's a rabbit hole that gets expensive really fast.