If they increase the danger of exploration, they need to give us some way to lesson the anguish that would come from losing thousands of systems of data all at once. I'd suggest a simple "Return To Civilization Drone", which carries your progress to that date, but has limited charges like a Shield Cell, and also relatively expensive to reload, let's say it's a mini Sidewinder in each charge, that takes a set time to actually travel back depending on the distance you are away... You can set which Faction it heads for, and when it gets there you get credit...
As for what else they could honestly add, I'd like to see some way to leave marker buoys with messages from the CMDR who left them for who follows after them... Maybe even a holographic representation of the Ship and Skin I was in when I did, floating forever in the void; again, very very expensive to not leave spam everywhere, but then that's what humans tend to do, leave wrecks and rubbish behind, so it wouldn't be unrealistic either if they did. I'd rather for gameplay reasons it was limited though!
I want to see some way to see what Data I currently have aboard, and when I get back, an easy way to see what systems I have discovered. Where was my first Neutron Star? My first Black Hole? The most rewarding system I've found to date? Personal favourites? Let me see where I've been!
Temporary base camps... you can buy a "Tanker" that attaches to you ship, which allows you to return and do minor repairs, but drops your jump range whilst carried and again, limited charges. Maybe even store your data so far there?
More science things; why not be able to carry jettisonable and re-scoopable experiments, which give different results if in different temperature/gravity/spectral/atmospheric areas. Land in system, see interesting star, leave an experiment, on the way back again pick it up and hand it in for further Explorer credit and cold hard cash.
We'd all like aliens, but how about scooping atmosphere from planets as well as fuel for ships, for further scientific research?
I'm trying to stay within the realms of the practical and non-lore breaking here... but why not go all the way at the end; give us
Bovo Sapiens! Yes, a whole cow civilization somewhere! Add them add them add them!