I'm not sure I agree with much of this! I like audio ducking a lot becuase there are often websites that start things playing too loudly and there is no way to navigate to the volume control if ducking is not active. I've experienced this when listening to a podcast that I wanted to listen to and I've also experienced it when going to newspaper sites and I have been listening to NVDA read the article only for it to start playing a video of some other news story and it can be difficult to navigate down to the mute button.
As for bundling addons into NVDA I suspect many people would find that getting close to being bloatware. The beauty of addons is that we can choose whether to install themn or not, and we can uninstal them if we find we don't need them or they are interfereing with something else. I can't see (pardon the pun) the pint in adding to the size of the NVDA executable when not everybody is going to use, for example, the WinAmp addon. I do use WinAmp every day but I don't use the addon becuase I tried it and it didn't enance anything I do with WinAmp, so I uninstalled it.
SO my vote, if you're counting them, is that I would not want lots of addons bundled into NVDA by default.
I'm pretty sure there was a discussion on this around the time Screen Curtain was developed. The general agreement was that the core NVDA program should only do screen reader functions and that things like the screen curtain or the weather app, things which I think I remember JAWS coming bundled with (it's a long time since I've used JAWS) were best left as addons for individual users to decide on whether to install or not.
Just my 2 currency units' worth :)