I’d love to come across a planet whose atmosphere has been stripped away by a violent solar event but you might still see structures half buried. Unfamiliar alien craft crash landed.
So, you mean, like one of the Guardian ruins systems?
The use of dramatic language in your suggestion doesn't correlate with something you'd be likely to actually see in the game. It makes it sound like something that's not in the game at the moment, when all of those things are, in fact, in the game.
atmosphere stripped = airless (and therefore landable) world
violent solar event = fairly close to its parent star, could be any main sequence star. All of them have the potential to have a massive CME at some point in their long lives that could strip an atmosphere. Could even be a White Dwarf or Neutron Star system within a planetary nebula.
structures half buried = exactly what the Guardian ruins are
So what you're asking for is to find some ruins on an airless world that's close enough to its parent star for a CME to have stripped the atmosphere billions of years before you found it. The only evidence of such an event you would find on the planet are the ruins themselves, which could either suggest the aliens set up on an airless world, or they set up on an atmospheric world that subsequently lost its atmosphere.
Either way, what those things would actually look like in the game, is exactly what the Guardian ruins look like. Which means that whatever other alien race you'd find would pretty much be hailed as a copy/paste of the Guardian content.
How about instead we find some atmospheric HMC, Water or Ammonia worlds that display lights on the surface on the night side, and find some strange looking space stations in orbit. Maybe signal sources that point us to strange looking satellites or orbital weapons platforms that turn hostile if shot at. Maybe finding a parallel species utilising supercruise. Imagine dropping into a system on the other side of the galaxy and seeing unfamiliar, odd looking ships pootling about in supercruise. Then they try to interdict you and the mini-game is inescapable, but you have the option of negotiating your way out of combat (rather than the current binary Thargoid interaction of either leaving you alone or attacking you). Possibly even negotiate access to one of their space stations and find... something there.
A suggestion that uses the game as it is currently but adds twists that we've not seen before.
