There is already a subscribed tab, and I use it most of the time when I want to catch up on selected topics. I use the local or all feed when I want to browse a wider view of what’s going on in general. Right now the total amount of Lemmy traffic is small enough that browsing that way is tolerable, which it wouldn’t be e.g. on reddit.
I do think that the Lemmy software design is more meme-oriented than I’d prefer, because of stuff like the thumbnail pic with every post in the main feeds. The more interesting parts of reddit to me were text-only and we don’t have that here.