how were the ratings for the OW championship or whatever that was broadcast on TBS?
About 280k viewers, which was a bit better than the CSGO group finals that aired in the summer on TBS.
Honestly, I think it was a bit early to air OW on TV when there aren't enough great casters and the spectator tools still leave a lot to be desired (though Blizzard has made some big improvements in the latter regard, as can be seen in the World Cup).