TBH, I believe you are applying your understanding of pure “modelers” (like Fractal) to the QC, which is not doing it justice.
The philosophy of the CQ is “provide a broad range of modelled amps, then offer capture technology for the more ‘exotic’ and user-specific amps” - that’s a “best of both worlds” approach.
No modeller will ever provide a model of every exotic amp every user may want at some time (although Fractal are trying their best to get there…) - that’s the domain of profiles, captures, whatever you want to call the approach.
Neural are providing a broad palette of amp and pedal flavors to achieve a wide range of sounds for all kinds of genres - definitely enough to get pretty much everyone a working repertoire (unless you’re into veeery specific sound characteristics). Saying “they lack amplifiers” is a bit of a misrepresentation, based on the broad range available.
(We can discuss bass amps - the offering is definitely narrower than that for guitars, but TBH, the QC isn’t really marketed primarily as a bass amp sim…)
But if you’re set on a very specific sound of a very specific amp, the QC has the capability to capture that specific sound and make it available live / in the studio without shlepping a big fat amp.
So if the Triaxis is so essential to your sound, your option is pretty clear - either create a capture yourself, get someone with a Triaxis to capture it for you, or buy some available captures of a Triaxis. Same with other specific bass or guitar amps you define as “essential” from your perspective. BTW: you can easily capture amp sounds from your Fractal, so if that one has your coveted Triaxis sounds, why not create a capture of a bunch of these and be done with it?
A statement like “The triaxis is the missing piece” feels pretty egocentric to me - another user could define THEIR favorite amp as “the missing piece” with the same right.
As long as the QC provides a broad enough range of amps to get there for most of the users, with the addition of capture technology for the very specific stuff that users just need to get for their personal idea of a sound, I think the “amp” angle is covered quite well.
I’d be more interested in growing the offering of effects (pre- and post-amp) - that’s something not easily adressable via captures (unless we’re talking drives, fuzzes and now compressors). Plus, I’d love a bit more flexibility around routing (e.g. use one lane for “send” effects and be able to easily route to it from the other lanes). That would really make a difference in terms of the sounds achievable and the usability of the device.
But “lacking in amps” - really? Have you ever worked with a Kemper Profiler? No built-in amp models whatsoever, but still a staple on stages and in studios….