SamusHey!
To the play-by-play casters who work with the observer feed whenever it's available: What can the observer do to make casting easier for you? Do you have any gripes when it comes to the camera work?
I tend to try and do a mix of in game fly by and observer feed (VDO NINJA usually) when I cast PBP. The only issue I find, which might be contradictory to the full on chest feed follow idea, is that switching to a completely different pov (fighting a side fight or switching a medic on the opposite team) during a fight can sometimes be jarring and makes it slightly harder to follow the narrative of a fight. This is especially bad with maps like product where a fight behind may be covered or a sudden switch to a sniper makes you miss the flow of a fight.
Again this is less of an issue with an aerial view included. The lack of cheat feed in EU games for the past couple of seasons has actually made observer feed a better way to cast pure PBP imo. I think having a cheat feed is overall advantageous for a viewer perspective.