It's definitely possible for them to update the animations for crafters. For many of them such as BSM, ARM, CUL, and ALC, it would actually make more sense for them to be standing behind a station or workbench. Others like WVR and GSM would be working in a sitting position. I don't think any of them would actually be kneeling except perhaps LTW, and CRP, and would also depend on if they're using the primary or secondary tool.

I've lost touch with crafting this expansion because I just got so bored with it, and new animations would definitely bring some novelty back to the classes even if only temporary. I would love it so much if I could take some screenshots of my character weaving/knitting a new garment from a comfy chair in my home.