IMHO most of the Data available on 3rd Party sites should be done in-game via the Ship's Computer. Or no later than docked (Allied Station or owned by a Special Faction/Company).
However, it would be limited to whatever onboard Scans were conducted by the individual CMDR or what that Allied Faction/Station knows about the local area - which is perfectly okay and still limits it all.
In my books, Universal Cartographics, the Universal Geology Institute and the Universal Mineralogy Institures would all be a thing - and have special places & Service Stations.
Places you can dock and request Information based on Rank and/or Reputation.
Other than that, we got that new "Contacts History" Tab, right?
How about issuing public Information Requests and permit Player-Player Information brokering, if available. Can be anything... Known locations of Volcanism, Materials on Planets or System Maps, Pristine Metallic Rings for Mining. Anything.
That'd put that "Contacts History" Tab to good use. Meet alot of Players? Better chances someone has the Data you need and accepts the offer (all pricing set by Frontier).
You're an ELITE Explorer and want to look at the Galaxy through the eyes of Universal Cartographics?
Dock at their place and visit their "Galactic Database Stellarium", allowing you to see everything they know. Including tools to triangulate or perform Deep Space Analysis based on powerful Filters.
You just returned from a large Exploration Trip and scanned alot of Objects?
Well, if you're lucky you get a notification Minutes after your Map Data sale... because you found a new UC Galactic Stellar Record Breaker entry. And are now in the Books of Galactic Discovery Records, which you can review at anytime.
There's tons of stuff that could be done with Information that all readily exists.
Unfortunately, noone at Frontier realizes the enourmous potential this has for Player-Player interaction, Data Brokering and i.e. the enhanced Realism of entities like UC - who for the 1st time could become actual Service Providers.
Arguably, Players could and should be the most interesting and comprehensive Service Providers amongst themselves. But I guess since it doesn't involve shooting each other, it isn't deemed of any use.