Clicking on Tags in the list should open a Tag view as it does in 6.25. Nested tags should be expandable and collapsible. Sometimes you need a broad overview of your tags. I just spent a bunch of time putting tags into nested groups. These were mostly tags created as I clipped things so they weren't organized yet. Doing maintenance on tags in a list is a real pain with the constant scrolling because of the limited view.
If you don't have a need for that broad overview of tags, just don't click on Tags, expand the list and do what you need that way. Taking away the broad tag view and a bunch of other features because they aren't needed by everyone or not as useful on small screens drives users away, leaving them easily accessed, but avoidable doesn't hinder those who deem them unnecessary.
I want to see counts next to tags and notebooks, I'm perfectly fine with that being an option in the list view for those who don't.
This whole drive to make all platforms the same is going to far. When I'm trying to do something on my phone and it isn't available, ya it's a bummer. Taking it away on my desktop so that it is the same as my phone makes me start to look for alternatives.