In my opinion, history access is a major advantage of Firefox over Chrome. There are many sites that I don't bother to bookmark because I know typing a substring into the location bar will bring it up as a suggestion faster than I would be able to choose it from a bookmark menu. Plus, it displays a bunch of related URLs which are surprisingly often useful.
I definitely would not want to default to disabling it. It's my browser, and letting it remember where I've been enables it to be much more useful to me.
> Containers are only tabs - so you can't, for instance, create a window and have all future tabs created in that window inherit that container
True, but if that's something you want, you can do that without the multi-account container tabs. Just create a new profile that's separate from the default one. The drawback to that is you have to reinstall any extensions you use because they won't be shared.