http://forum.square-enix.com/ffxi/th...l=1#post482618
Between how fast you level now, being able to buy weapons and armor from Records of Eminence NPC, and Trusts always being your level, upgrading armor every few levels isn't a requirement anymore, and even upgrading every 10 levels, a piece of armor won't last you more than a few hours. As such, people have stopped selling it on the AH because the game gives it away via RoE and treasure caskets from Fields and Grounds of Valor areas. Someone is going to level past a piece of armor so fast, they may not check the AH before they don't need it anymore, and the majority of the servers have leveled the jobs they want to level.
http://www.reddit.com/r/ffxi/wiki/qol
There's a list of big changes since the December 2013 patch, and links to the patch notes that describe how to start the .