User blog comment:Wrath022/Chapter 517: Wendy Belserion, Review/@comment-5268982-20170116121338/@comment-7418318-20170116183729

Yeah, fighting naked might actually be Erza's best choice, but despite Erza not minding it, the editor and the magazine do, so that's not really an option I suppose.

As for clothes vs. armour:

If the strength of the explosion depends on the mass of the enchanted object like a classical explosive does, then a single layer of cloth would provide less material and thus cause less damage than armour would.

Furthermore clothes don't encumber Erza, unlike armour. Sure she's so strong that a bit of metal won't slow her down much, but sometimes every fraction of a second counts. If it was the past I'd say she should use the Flight Armour, since that's just enchanted clothing too... but considering how Erza was "out-sped" by Kagura with her Flight Armour and still managed to match Kagura's speed without it... yeah, fuck logic.

It would be nice though if she were to use some of her older armours from time to time and only pull out new ones if the also do new things. That bunny armour she had on until this chapter was completely superfluous. Apart from the Adamantium Armour literally every other armour of Erza's could have been used in it's stead and nothing would be different.