Main priority for me. They included a light dungeon segment in Ganon's tower when we had to dispel the Light barrier, showing they had an idea in mind for a Light Temple. Adding in that and a use for the Ice arrows would be huge
I am holding onto partial hope that new content is added to Ocarina of time and it's not just 1:1 with improved visuals and voice acting. This faint hope is because the depths were not shown in any of the trailers for TOTK prior to release