The new Search tab unifies Trends, People, and Top Tweets under a Browse section, with Saved Searches and the classic search box still available at the top of the screen. The dedicated Top Tweets option is quite enjoyable -- I have indeed found myself browsing such flow of status updates on a couple of times for the occasional laugh or remarkably snarky tweet. Top tweets now also show up in regular search results, and they are marked by a silver star indicator.
Trends, on the other hand, can be changed to another location directly from the search view of Tweetbot 2.4 -- I don't use Trends, but I assume the option will come in handy for those who, for some reason, like to check the recurring #Buongiorno trend in Italy.
Keyword Mute Filtersquite some time now. Version 2.4 now allows you to block specific keywords -- not just users or clients -- and there's even support for regular expression if you really want to make sure you're not reading about the latest spoilers in Game Of Thrones. Mentions can be muted as well.
There are plenty of other refinements in Tweetbot 2.4. Offline support, for instance, will ensure tweets marked as favorite or sent to a Read Later service when no Internet connection is available will get "queued", then sent/favorited as soon as you come back online. Sure enough, while browsing my timeline in Airplane mode, I fave'd a couple of tweets, sent some links to Pocket, and Tweetbot queued them. When I turned WiFi back on, the app refreshed, the tweets were marked as favorites in my account, and they appeared in my Pocket.
Additionally, aside from the usual bug fixes, you can now swipe to the right on profile views to go back; items sent to Pinboard are marked as unread; and last, the compose screen comes with basic smart quote support (for quotes, em dash, and ellipsis).
With powerful new features and UI refinements added to an existing set of great functionalities, Tweetbot 2.4 retains familiarity while striving to remain the best third-party Twitter app for iOS. Get it from the App Store today.