TL/DR: players spawning late into a galaxy are at a significant disadvantage and by regenerating current resources and respawning a new type of resource we can help level that playing field. This is not about what those resources might be able to.
Recently ive started in the speed galaxy and it became immediately apparent that I would be forever stuck with 2nd tier planets and systems if I was lucky or we would have to wipe another player to make room for me to have a halfway decent game.
Unfortunately, a good number of players have quit so I can readily find several good planets, but not all players have this benefit, and more importantly, the newest of players are unlikely to enjoy this. As it stands now, it is my opinion that the mechanic is more useful to exploiters than players using the mechanic properly. Because basic resources (the ones we have now) are so important to any nub, and there is a noticeable lack of easily farmed resources later in the game, I believe resources on planets should regenerate at a very slow rate (10% of its density per hr for example) and stop when the mineable res reaches a relatively low amount (5% of its original deposit for example). This wont be as good as when a player starts in their own area, but it wont be as bad as starting in one mined bare.
The next idea is a slight variation on a previously proposed idea which is resources comparable to iron, and spices in games like civ, with the notable exception that they can be depleted. I’m not sure how I would prefer the specific mechanics to work exactly (spices might increase happiness or growth rate while iron could increase hull strength, reduce a resource needed to construct something, or be consumed in some larger process whether by its construction or by using it as upkeep) but thats not exactly relevant. The idea is that once depleted, that resource would then be moved to a nearby area (possiblely/hopefully to an adjacent player) where it can be mined again, but it would be random. If no player has spawned in that area, the strategic resources would spawn with the new player inside his protected guard zone ensuring the new player would have a good chance to aquire it before opposing players and have a strong start.
Naturally, as the resources move and spread throughout the galaxy, players yet to spawn would collect a good deal of them, so there should be a minimum visible (strategic resources that are not being held for new players) count with the new spawn someplace near 0,0 but a player would not find himself in a resource deprived area for long as the resources would find him. He would have to periodically scan his planets to find them and previously useless planets may become highly valuable if a deposit spawns there increasing the importance of scanning all planets, not just the ones presumed useful.
Edit: this would increase the need for strong automation as players would constantly have to build outposts and such, which can be monotonous late game. This can also introduce areas for new tech.