There are some duplicates in the list. First, CG and CGI staff are the same. So CG Artist and CGI Artist don't have to exist separately, it's the same job. Same goes for CG / CGI Supervisor etc. And it's definitely CG and CGI, not "Cg" or "Cgi". It seems that CGI is used more often nowadays, so all CG jobs can be merged into their CGI siblings.
Then Visual Effects Supervisor / Visual FX Supervisor is also the same job. As are Compositor and Visual Effects Compositor. Compositing Supervisor is also Visual Effects' job. And Visual Effects in all job titles can be substituted with VFX.
Director of Photography is rather a guest crew type. They've often changed on the same principle, as directors. The same is for the Editor, because often different directors work with different editors.
Also there's some odd job called "TV Photog". Looks like mistype or something.
I don't know if it's possible to change crew types without breaking already existing data, but at least some typographic errors can be fixed I hope?
