yes, and like you say, it would be kind of like a splitter, but with some diferences:
obviously 1x1 instead of 2x1
four enters or exists, to use as you want to, instead of just 2 enters and 2 exits
a propper filter system
and last but not list, the posibility of controlling wich side of the belt you want to use
basically what the sorter is now, but with the splitter mechanism
also, dont get me wrong, the priority sistema is good for some designs, Im not asking you to remove it, my idea was that you just added some kind of splitter-mechanism option, appart from the priorities (this option would of course invalidate the priorities, but they would still be available to be used)