Personally I found RWBY was at its best when it was a charming web series with really good fight choreography that used really creative weapons. It felt like you were watching someone play an action game really skillfully. From volume 4 onward the series lost that distinct fight choreography (No doubt thanks to the tragic passing of its creator) and started taking itself a lot more seriously, putting its mediocre at best writing at the forefront.
Because of this I don't think the SHAFT series looks very promising, as it looks like its going to be a very standard anime when the unique visuals of the original story was its main strength.