If I want to manage the categories that I subscribe to, currently I have to navigate to those categories and subscribe/unsubscribe. This assumes that I remember exactly what I’m subscribed to.
On the Profile > Subscriptions page, I would like to see (and I’m surprised you can’t today) the categories I follow, so that I can easily manage them. As a long time member of our organization’s community, on my Subscriptions page I see 400+ posts that I’m subscribed to. Maybe buried in there is the list of categories I subscribe to, but there’s no way to see that.