Your old interface allowed people to select their labels from the list when creating a new task. Not only is this new autocomplete feature a time suck (it takes way more time to type each label than to click several and save), but it also assumes that people remember every label they have. We use Producteev for order fulfilment tracking and have several labels for each task (order). I now have to remember each label and begin typing it - which leads me to the problem of duplicate labels since now you've merged all our workspace labels into some universalized system.
Please please please change it back. This has doubled our administrative work!