There are some very cool positives on this.
I did read one article that said that these hulls will be reloadable, so you would be able to tailor your load if you wanted. I wonder if the 888 powder does not have to be compressed, it seems like the 100gr and 120gr versions would either have a set of filler wads or there does not need to be compression like any of the other BP substitutes.
You are still loading through the muzzle and you still have to prime afterward, so the time to load compared to pellets or pre-measured loads will not change.