To be honest I mulled this over and over for over a year. Originally I totally agreed --
Relics let you give the win. In the past there was a major cost, you lost everything you worked for in that era individually. Ouch. I like that, in a way. Prefer it, even. But only when people respond to it by fighting, rising up, going "screw it, let's just try to win then!".
...But, things changed since. Now you also want blues, I fear changing this system back under the current gameplay, wouldn't do much. Relics though, look awesome. For us vets they're dull, but anyone remembers their first time with a relic?
I do. It was amazing!
Perhaps a compromise could work? Say, if your colony is conquered, the relic shifts ownership?
Or maybe deletes and is re-created in a random position with units on it?
Wouldn't address competition (different ideas on that end), but it could help with any frustrating delays Josh mentioned.
Edit: Could even counter this by returning a few relocation tricks, like making nukes hit units returning from a colony conquered, so you can choose to try winning a war for a lot of score.