Why are some items unstitchable? Specifically, the shrimpy shellmet? I spent some time grinding to finally get it. It's only a level 5 hat item, so pretty useless for my level 65 character (though it really fits his general style). Imagine my disappointment when I found the seamstress won't allow me to stitch it over a better piece of gear. I can't understand why you won't allow it to be stitched. I admit, it's not the end of the world, but at the same time it seems a rather arbitrary restriction. Does anyone know of any other non-stitchable items? Perhaps we can compile a list.
You are correct that the nefarious weapons are also unstitchable. This is a shame, because they're so powerful and desirable...but a specific weapon type may not necessarily fit my pirate's general design. For example, I have one especially 'feminine' style privateer who uses a shield and sword, but the Bound Oni's Bulwark is rather harsh and ugly, in my opinion. Now, that might work for another character, but not this one...I wish I could change it to a more 'genteel' design.