Belts, splitters and loaders now need power and can be can be made more efficient through research.
Small changes concerning balance, gameplay, or graphics.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Changes to power production and distribution.
Seems the powered belt overides the overflowing one.
"why won't you let me die"
With this continued version of course : https://github.com/lyttelgeek/BeltOverflowContinued