I know some people may beg to differ but I would really like it if the character does indeed movies like a ninja. An expert thief would have to be fast and agile and not crawl like snail.
Imagine jumping up to the ceiling River Tam style or parkour across rooftops.
But don't turn me into a killer. Give me a knife for defense against rats and to use as a tool. I am not the dude from Dishonored.
I would rather have it be a Thief game since it's you know, a Thief game.