You claim that people who are now paying what others have been paying all along are paying 10x what they were before. The logical corollary is that these people were paying 10x less than what everyone else was at the time.
As I have yet to see evidence of change to repair costs for lower level characters, I refute at least a portion of your question. End Game gear, its unreasonable to expect people to pay different repair prices based on whether or not they wear social gear.
The logical corollary is that everyone could have been paying up to 10x less than they are now, depending on the type of gear they used.
People using a lot of orange / moddable gear are now paying up to 10x more than they were before. That is the problem.
Why should people who wear social gear be heavily penalized in repair costs? How is THAT good for the game?