Hey
@PaulC - I think "high output" is a relative term in this context. A lot of music marketing speak can get fuzzy due to this.
IMO - the current gen Luke 3 pickups are "high output" relative to vintage voiced humbuckers and single coils. For reference I'm a lifetime player of the "PAF Sound" style pickups. I think the Luke is certainly hotter than those and more open as tbone said. However, if you're comparing the Luke 3 pups to a very specific aggressive/hot output pickup - then your tastes may vary. The nice thing about the Luke is the onboard boost if you need that extra saturation or volume boost up front. I've covered a lot of ground between old-white-guy-rock and terrifying licks on the Luke, and I've always been able to find a sweet spot for sound.
For my money the Luke 3 is my all-around favorite lifetime guitar. Others are beautiful and have their specialties, but if I could only have one on an island - I'd take the Luke. If you find the sound is "very weak" (etc), then try troubleshooting some basics (i.e. replace the battery, new cable, run to the front of an amp/sim without anything else in the chain, try different presets/etc.). Good luck - I hope you find the love of sound you're looking for!