The tailoring menu, as well as the new time/resource/difficulty of reinforcing clothing and armor–had me thinking that perhaps it’s about time to cut XL items out of recipes and add them along side the ‘line with’ options. XLing an item should significantly increase weight (but probably not encumbrance, since it’s being made to be adjustable) and require PLENTY of the material in question. Essentially obfuscating the idea of a mutated survivor making one finger of a glove longer for a talon, knitting around their horns or adding a leg to those pants for a tail.
Mind you XLing items should have a high difficulty check, as mutated anatomy should still be the hurdle of less accomplished tailors.