FYI- With regards to Update 14 splitting out LIVE and LEGACY modes, here's my strategy at the moment:
EDDN has been updated to include game version information, as long as the clients (EDMC, EDD, etc) send that information correctly. Not everyone will download updates to these all at once, of course.
During the downtime today, I split the fleet carrier database tables into separate copies, with the same pre-existing data. I'm updating the LIVE copy only when there is version information that indicates ED version 4.0 or later is being played. If the version information is missing, or indicates an earlier version (3.8.x, etc), then my code assumes the data is for the LEGACY version. For now, lots of updates will be going to LEGACY that really are meant for LIVE, but I think it's more important to keep legacy data out of live, rather than keeping live out of legacy. So until more people update their copies of EDMC and EDD, etc, we'll unfortunately be missing some data that should be updating the fleet carrier data in the LIVE copy of my database tables.
For cartographic/scan data, I don't think the StellarForge has changed in any meaningful way (and have doubts that it even can change all that much), so I'm allowing updates regardless of the game version.