Comment submitted to TV Barn:
You suggested that [football broadcasting without announcers] would be interesting. Well, it happened in Canada in 2005.
The CBC was going through a strike, but the bosses wanted to carry on with [CFL] broadcasts. Management manned the cameras, etc., but there was no commentary, just the natural crowd noise and the field announcer.
The broadcasts were almost universally panned. This situation resulted in worsening relations between the CFL and CBC, and the entire TV contract was given to TSN.