I actually really enjoy this, it’s really cool to login each day and only see UK specific content in a similar style of the subreddits of old, and with most of the features of Reddit. Previously I had to have them with a multi reddit, but my home page was full of world wide content.
I like that due to federation I can still look at content from around the world but it’s not my default experience. Feels more personalised.
I’m subbed to the lemmy.world one, not sure I’ll bother with the others. I suspect the smaller ones will be largely inactive and just confuse me at some future point (my future self being easily confused).