Yeah these ones the thumbs actually fine, it's the GDFB ones that have the thumb flat like oven mitts. These ones by default have the thumb folded into the palm. So I have no problem gripping swords, I just have to remove an inch of material from the side. Hopefully that will be doable as I plan to attach these to my hauberk after modification with a little help from someone.
Heres some better pics:
Not sure how I should modify them but I do think they're a bit big which annoys me a bit considering everyones bigger than me and every bit of clothing I buy is too big for me.. Seems custom is the way to go or modifying whats off the rack.