Hm, not arguing that the QC isn’t a great piece of hardware. But I would say most other brands offer more for bass players. The QC has no synth block, no OC2 or similar octave pedals, no multi compressor, very few amps and cabs, and there hasn’t been a addition to them since the release of the QC.
In fact I can’t think of anything that the QC offers specifically for bass that the other big brands don’t.
Also capturing doesn’t work as great for bass IMO, because the QC can’t capture compression. Which is a big part of bass tones (best example: Parallax).
There is a feature request thread for more bass stuff here: