I'm disappointed there's no threadiverse integration.
The basic grunt work of bringing together bluesky and mastodon feeds is pretty decently done, if a bit opinionated.
I like the concept and presentation of their feed "packages", but for most of the feeds I've been proposed in the app I'm not interested in the entire package. It's nice that you can still directly follow the actors packaged into a feed from that feed's page.
It's very annoying that Surf wants their/my Surf account to act as the intermediary for my mastodon account. From what I can see, this means I need to exit the app to take some action with my mastodon account. Maybe I just haven't found the option, but if there isn't one then it's a hard blocker for me to use it as my main fediverse browser.