oioi, there's a very very simple test running on your Luna: the free KickMe bass drum by Adern. Try to find something like that as VSTI - the thing is deeper than the ocean, clicks just below bat sounds frequencies with lighspeed punchy envelopes

Just take care at the proper cans or monitors

Anyway, if you find out that more dsp is the way to go - this doesn't make your Luna useless. There are widespread options how to extend it, you original investment keeps it's value.
We just wanted to prevent that '... I've paid sooo much - and now only a single voice ???' experience.
If you listen closely to comparable synth setups on Luna and VST you'll easily hear the difference.
Luna synths CAN be used without FX, native ones usually fail.
Afaik there isn't a single patch in any NI synth package without FX applied.
cheers, tom