+AC Gonfaloniere, I'm with your 100% on the whole manufacturer/OEM thing (I've worked in the OEM/IHV space for a long time).
That said, it's getting a bit "weird" with the 6P right now. Google "appears" to not be servicing the devices at the previous level (pre-Pixel, mostly), and certainly Huawei isn't about to insert themselves to fix things (s/w-wise).
My camera refuses to focus about 75% of the time anymore, and I'm unable to disable "Ok Google", the second of which is undoubtedly a s/w issue (really prevalent across more devices).
Accordingly, if you call your s/w support people about either (Google), they re-direct to Huawei. Huawei support says "those are Google s/w issues that we (purportedly) know about", you need to talk to them about it.
So then where are you, exactly?
Yep, the problem here, as I was trying to state at the beginning of the thread, is that Huawei is trying to pass off their responsibility for software issues. They're doing this through part 8 and 9c of their warranty terms, so it's probably technically legal - however it remains their baby. Google isn't going to replace the hardware when they're prohibited from doing so and Huawei isn't going to release new software for the device. Both of those things would be encroaching on the other partner's part of the agreement. Software fixes will have to be fixed by software updates, not warranty, unless those software issues are bad enough to result in the device needing to be replaced, in which case that would fall back to Huawei (unless purchased from the Google store). That's the point where Huawei is going to point at the expiration of the warranty and say that the product was working throughout the entire warrantied period and that things that happen after that period are not covered by the warranty.
And this is more or less how things are intended to function with limited warranties, which sucks - but that's the business. The same thing would happen if you had a TV for 15 months and then it started randomly disconnecting from Bluetooth. The manufacturer could replace it, but they likely don't have an obligation to do so.
This is where I insert my opinion: As Huawei has no control over the software updates and Google is prohibited from providing hardware replacements, the only logical response possible is for Huawei to provide hardware replacements for software issues - and then they should be billing Google the cost for doing so if it can be established that the defect was infact not hardware on that unit. That makes the consumer happy and whoever caused the issue at the end of the day is footing the bill.