Overwatch 2 director Aaron Keller has posted a lengthy blog on Steam about the transition from 6v6 player matches in the first Overwatch to 5v5 in the poorly received free-to-play sequel. It's a juicy read for armchair designers and lapsed Overwatchers like myself, packing in analysis of class roles and the shift from the free choice of heroes to single hero picks and enforced team compositions.
In broad strokes, Keller summarises how the Overwatch experience has drifted away from "player freedom and creativity in order to create a more balanced, consistent and competitive experience for players". It's possible, however, that Overwatch 2 will swing back in the other direction, as Blizzard are now "exploring how we can test different forms of 6v6 in the game to gauge the results", with a view to restoring some of the joyful chaos that saw entire teams of Reinhardts charging the objective in formation.