For the amount of money your users pay per month, it's disappointing you don't have a simple caption editing window in ALL THAT FREE SPACE above the timeline editor. I have a hard time believing it would take more than a day to write in the code for this type of function.
This is probably one of the most common problems for all of your users if you look at the message boards.
If you're currently employing someone who's supposed to be implementing this function, it might be a good idea to check up on their progress and maybe hand the task over to someone more competent.