I don't know what to think with this. I get it took people a long time to get these items, but it should of never been that way. This was the same thing for Sky items though, Byakko's haidate took years for some to get, only to have be next to junk with Abyssea.
I'm sorry but that is not an accurate analogy. The analogy would be accurate if you said that when Chains of Promathia came out, all Ground King, Dynamis and Sky gear (including level 75 relics) were suddenly obsolete. In fact, you'd even have to say that most of the content was obsolete by the time you completed the Promyvion chapters of CoP, not just the final battle.