No assumptions necessary.

Faatal already confirmed that the people working on the sandbox update are different than the people working on bandits and none of those people are taking turns at a single computer terminal. He also clearly stated that features scheduled for the new 3.0 and the new 4.0 are being worked on concurrently.
People should remember that Rick warned that bandits would be delayed until the concerns brought up at the town hall stream were addressed. A fair number of the options in the sandbox update directly fix what people were concerned about without changing the game defaults and forcing everyone to play the same way that the complainers wanted the game changed to.
If people will stop and think about it, most of the complaints stem from TFP moving hard into the RPG/forced progression aspect of their game. Bandits, reputation, story, etc are future developments that will continue the direction of the game into this area and without the sandbox options that are coming these changes would continue to irk people who don't want that stuff. So it makes sense to get this update in the hands of the players first to finish the changes TFP promised in their town hall AND to provide an escape from the default game for those who aren't enjoying the way the default game is heading.