While I agree about the effects quality and slow development, "boring" is not always a bad thing. It can also mean "consistent" where the things the unit does are not changing all the time - basically what Boss does. But Boss has always been "the Boss" of having effects that are just plain good but might not blow your socks off, and that's not what I can say about the QC.
I think the issue is less that the QC is a boring device and more that it was explicitly sold from the initial hype announcement to four years later as "an ever-expanding collection of guitar and bass algorithms", which....LOL.
The pretty-much-unchanged-from-2020 FAQ (which says a ton in and of itself) on their site is filled with outdated howlers like:
"Of course, there are other ground-breaking features such as Neural Capture that you simply cannot get in any plugin."
Because "of course" there are no amp/pedal capture plugin options on the market to compete with this hardware. Not a one in the foreseeable future.
"What are your plans to incorporate more amplifier models, IRs and effects?
Very aggressive plans. Our pledge is that the collection of sounds will continue to grow, permanently."
So aggressive in fact, that they seemingly ran out of steam around August 2023, a little more than two years after launch with no additional devices announced or even teased for launch in the 7 months since.
You mention BOSS, and it's a perfect case study in how to (BOSS) and how NOT to (Neural DSP) manage expectations. By any objective standard, the QC is the more actively developed device, but BOSS doesn't get roasted and grilled across the Internet for years because they sell an accurate image of their products. So relative to what they say they will do, BOSS delivers almost every time. Meanwhile, NDSP can't stop stepping on rakes and self-inflicting damage.
All they had to do was stick to the stuff that wasn't easily duplicated - mating captures and modeling in a hardware unit - and leave the stuff alone that wasn't easy to live up to - "aggressively" adding content while also "aggressively" translating plugins while also killing bugs and refining the UI of a first-gen hardware device.