So we have with this mod higher belt speeds and what about the splitter? Splitters are no belts/underground ones so are these gonna get also a modded version? It otherwise make no sense to have an upgraded belt to f. e. 1k/s speed and put a same-color splitter in the line with only 30/s speed (red ones).
I also see no change with the factoriopedia ingame so they are definitely not changes over this mod but this could be easily added I think.