Heroes of the Storm’s 2.0 update is about rewards, not changing the game

Blizzard has rebooted Heroes of the Storm without actually rebooting it.
The developer  has made a big to-do about Heroes of the Storm 2.0, effectively relaunching its free-to-play multiplayer online battle arena (MOBA) for PC. It launched earlier this week, introducing a new rewards program that takes a lot of cues from Blizzard’s hit team-based shooter, Overwatch.
And why wouldn’t Blizzard want to  spread some of Overwatch’s appeal to Heroes of t