So, something more concrete as to what was added to the final product rather than removed/changed, that scene was definitely part of the reshoots: http://collider.com/rogue-one-darth-vader-scene/
Maybe there was once a version where Leia really was on her mission to pick up Obi-wan, and either the Rebel Fleet relayed the plans to her, or the spies on the ground sent the plans directly to them rather than to the fleet, this may account for the re-positioning of the communication dish, the reason for which wasn’t really explained in the film.
Maybe no big news but at least confirmed in an early script to include Vader heading down to the planet, according to Gary Whitta (who spent 9 months writing the screenplay, before being replaced by Chris Weitz). Whitta also apparently wrote the Vader on Mustafar-scene which made it into the final cut.
https://twitter.com/garywhitta/status/1219439992197373952?s=20