Yep, when it comes to shop clothes, fair enough, update them any way you like - it's a complete waste of time imo, and from Al's posts, it seems etriel isn't interested in taking feedback anyway, and shop clothes are still going to be obsolete in an age of sets - but for actual SETS that could become viable and that could actually fix your game if handled properly, they really should update all items of a set at once, not the hat one month, then 4 months later the neck, then 4 months after that maybe the shoes etc.
either start with 2013 sets, and work your way up, start with 2020 sets and work your way down, or hold off completely on putting the update on production servers until it's actually complete and been tested, because doing hats only is a pointless, illogical mess - Especially when those hats are meant to be worn as part of a set.
Set Bonuses are just as important to consider in the re-balancing.
PS: The game is now about sets, if you didn't get the hint
PPS: I think it's great that the sets are being updated too, just disagree with the illogical approach.