I think it is a good thing. It introduces something very difficult to get in the game. In my opinion this gives some purpose to the game.
I think Tibia has lived all these years because of its difficulty, like strong death penalties, very difficult bosses, unsolvable quests and extremely rare items. Nowadays I think things are being simplified too much, in a 'dangerous' rate, like with these very powerful items being added, with +5, +7 and +10 stats, or with hunts that allow 1kk/h profit.
However I think the sole purpose of the outfit is to reduce inflation, which will not solve the problem. Hopefully they will solve the problem before losing control of it.