I can't speak for the rest of the issues you raised but I can assure you that the team that focused on OBS mode has nothing to do with the developers working on balance and bugs. You may consider this an overdue feature but this is something we are asking from years and that Relic surely planned to do way before they added all those bugs in the game.
I am sure they know very well that when the ESL event will start the game will have to be in a very clean state (and I'm not talking just about bugs but also about input lag and performance optimization, as well as balance OFC), let's see what they will be able to pull out.
This!