[Honor View 10 Guides, News, & Discussion] The MBG:
I leapt on this thread previously, so I've outlined the issues previously. However, I'll provide more detail here.

Notifications - Initially a proportion of notifications were not coming through. This appeared to be sorted by taking the apps in question out of automatic control. However, clearly some notifications get delayed, This is most noticeable when the phone has entered the 'doze' zone as I like to call it. If the phone is left idle for a long period, then little or no app notifications will appear. So you'll find first thing in the morning a bunch of stuff coming through when you start using the phone.

Then theres's the sounds, I've found unless the app has a specific option to select the notification sound, you'll just get the phone's default one i.e. Whatever you've chosen. This is a problem with things such as Sky or BBC Breaking News alerts. Both apps have dedicated sound alerts, neither provide the ability to choose. So this means it's impossible to audibly tell what an alert is, unless you can specify the alert sound in-app. A nuisance when you are busy or out and about.

I have tried to resolve this by installing the app NotifiCon. The app provides notification sound customisation on an app by app basis. While it initially appeared to work, there was a problem. While it was fine when the phone was unlocked and being used, the selected alert would be heard. When locked, only the phone's default sound would play. That is until you unlock the phone, then you'd get the one you specified in the app! Not quite what you'd want. I do need to get back to the dev to report my findings. He might be able to resolve it. However, I should have to be seeking third-party solutions to a very basic function.

Widgets - EMUI based phones appear to have a real issue with scrollable widgets. In my checking on the net, I've read countless reports on XDA, other forums and Facebook. Again, I've found my news apps to be the worst affected. Widgets either don't function or get stuck. The only workaround is to use Nova launcher and flip the phone into landscape which supposedly indirectly forces them to update. Even that is somewhat hit or miss. I feel sorry for those that rely on a calendar and other widgets that provide time-sensitive functions. Once again, this is basic functionality.

Bluetooth - I stream a good couple of hours a day. I use Android music server software Muzecast and listen to a number of podcasts. So I want Bluetooth to be a smooth as possible. Alas, I've found, like the OP in the thread I mentioned above, there's something not right with View 10. Speakers will randomly lose the ability to play/pause and, if the speaker supports it, skip tracks etc. Note - volume control isn't affected. From my experience, I cannot pinpoint what causes this. Again, this might not be too much of a bind if your speaker is next to you on the desk. However, I can see this would be a huge problem with headphones or in-car.

The second problem, I've noticed a CD skip like sound affecting playback. It's not frequent but you will spot it. Also, the sound can get garbled for a second, this is quite jarring when it happens.

Finally, the connection is hit and miss. My main go-to portable speaker has trouble hooking up with the phone. Often it will mean toggling Bluetooth off and on in the settings. This contrasts with my soundbar which works first time, every time. However, this creates another issue. If I'm playing music on my portable speaker and the phone is in range of the soundbar, it automatically switches to the later! Umm. . . That's surely not right, since there's no setting to prioritize which device playback should be through. It was so frustrating that I unpaired the soundbar and if I want to listen with it I use an old tablet instead.

So there you go. I'm certain these are in the main cross-device issues which are down to EMUI. The specific Bluetooth problems may be a quirk of the View 10, but for the rest, you can find plenty of evidence across the web. Huawei appears to be paying lip service or just ignoring them while quickly bringing the next handset to market. Disappointing.

Edit:

No, I'm not, as you'll see from above.