The difference between a Pathfinder hitting Upgrade or Tile Reveal on your first ruin is ridiculous. Compared to anything else, there's no competition. It steam rolls so hard (too hard) into picking up all of the other ruins in your vicinity, and you get access to remote regions first (embarking, mountain walking) which compounds the issue. I don't really see a way that those rewards can be balanced, and I don't think they are fun in any way. They feel bad when the AI gets them and eats all your ruins, and they feel bad when I get them because they obviate the entire early scouting mini-game.

gold or
production, it doesn't give you more if the ruin gives you a free population or free tiles.
science instead of a free tech, because if I prioritized something to research, that's the tech I want finished. Not some random other tech.