The ability to have Encounters (as in other rulesets), which allows you to set up a group of NPCs before hand, that you can drag into the Combat Tracker
Can you not setup a bunch of combat trackers in advance ?
Of course, 4E only has ONE combat tracker, IIRC, which one of the many "encounters" can be dragged to. And I presume these "encounters" get exported into modules too, which you certainly can't do with Savage World's combat trackers at the moment.
I often have multiple combats on the same map, if this were set up as different combat trackers, I would have to keep swapping over the PCs on the map. If I had (like other rulesets) a "clear all npcs" button and separate encounters to drag and drop (for me) it would be much easier.
To enable a lot of the cleverness required for the updated combat tracker, I've had to drop down to using a single combat tracker. So this is probably going to become the top item to pick up really soon I suspect.