1) Please make the HD maps integrated into the game as so that way the planets and moons (at least in our solar system) are already good looking and ready to be viewed in all their majesty instead of having to download extra extensions
This would require that everyone who wants to use SE download 50 GB just to install and use the program. This is pretty unreasonable, especially since not all users care about Sol system worlds having great textures since they spend most of their time exploring procedural worlds. The current system is pretty good, IMO: users who want the added detail can download it, and those who don't want it don't have to.
2) I would like to see the mods from the NASA stuff like the Hubble Telescope, ISS, etc as space ships that we can fly around in. I love the ones that are in the game as the default ones, but it would be pretty sweet to see stuff from NASA be playable too
These are currently available as mods, and might become official addons or default spacecraft at some point in the future. If you can access the old forum
, look for my mods and addons thread. You can download (slightly outdated but still working) Hubble, ISS, and several other craft. If you can't reach the old forum, then be patient as I'll release them here soon™.
3) For the descriptions on the planets and moons, I would like there to be info on the planets, moons, nebula, etc that we have already discovered. I just find it odd that for some reason, only a very small hand full of planets (such as the sun and earth get a description) but other things like Eris or the Cat's Paw Nebula have totally no info attached to them
At present, all of these descriptions have to be manually written, not copied from anywhere, and should contain accurate and updated information. Doing all of this takes time, as you have to look up information, often from multiple sources, on every object you write about. As there are well over 100,000 catalog objects in SE, writing about every one would be impractical.
But if you'd like to work on some of them, feel free to post your work on the forum and it can be incorporated into future releases.