It’s a good idea, but I think that would work much better if we actually SAW Anakin being treated badly. In the actual movie, his slave life doesn’t seem all that bad. This is a minor issue in TPM, but having Anakin’s vengefulness being a plot point without seeing his abuse would make the issue much more obvious.
One of the changes I was planning on making was taking advantage of the alien language dialogue and making Watto verbally abusive and alluding to worse stuff happening off-screen.