I actually use the Steamer(updated) which to my knowledge gives a full season projection based on the ongoing season actual results. The Steamer ROS gives projected data only for the remaining games, which would look ok if shown as a ratio when comparing to other ROS projections (taken at other time stamps and as such with more games) but not so much when comparing 1-1.
When I update the report I download the Batter - actual, Batter - Steamer Updated, Pitcher - actual, and Pitcher - Steamer Updated, run a couple of SQL statements in PostgreSQL to add the relevant columns to the main table, and then replace the data source in the Tableau report with the updated version. I am looking into adding the new data in Tableau itself but will likely stick with the existing process for the remainder of the 2016 season.
I do not use the Fangraphs Depth Charts at this point. Did you have any concerns about the data?