One for all available every time a new champion is out

When a new hero is created in Overwatch. A free for all mode is enabled. Basically anyone can pick anything even if the champion is already taken. Similar solution could be a one for all mode for 3 days when you can only pick Pyke. That way everyone can try him out.

In League everyone is instalocking the new champion, wanting to try it out. Why not have a weekend when everyone can try it for free?