Need the ability to edit existing posts in a category queue. Currently, you have to go a really long-winded way in order to edit a post (delete & recreate).

For example, If you spot a typo in a post that has gone out, you should just be able to jump onto the category queue, make the edit, and it will be fine going forward.

Even viewing the posts that are inside of a category queue is difficult...

I'd say look at SocialBees setup for examples of this.