There was 2 aspects of Relics that were commonly pointed to as causing frustration
- The Chronote cost to swap
- How long it took to swap between sets.
This system should solve the second point in the majority of player cases but when it came to the cost we didn't want to undermine the chronote economy overnight as they were built into the skill as a intended reoccuring cost and while annoying maintaining gold sinks like this is generally better for the long term health of the game.
While its not a removal of the entire cost, getting 20% off swapping between your main sets is a reasonable reduction and now that the system is in place there is a precedent for future reward spaces.