Despite only using the Official Twitter App for Windows Phone 8 for about 10 minutes I am disappointed in some of the key features that are missing.
Well to be honest so far only one or two. They are the auto complete for @ (users) and (#) hash tags. Auto complete exists on the Apple iPhone 3GS and has been for a couple of years I think.
Twitter really do need to ensure that all major platforms (new or old) have features like this. To be honest so little can be done with Twitter I can’t understand why it wasn’t part of the inital build requirements when they created it for Windows Phone 8.