There are times when you want to use more inputs then the build has. it would be nice to have something shaped like the sorter, that lets you put 2 belts of different objects to a single connector with out the belts blocking each other.
For example if you wanted to have potatoes and corn in a single level 2 food market but only have one belt input. You don't want your corn input blocked because its full of potatoes.
Or (as shown in the picture below) have a single food processor making meat and sausages, I would want a second flat input for the flour. Currently this only works if I truck the flour in.
Yes you could fix any example you can think of by giving a building more inputs but it the times that the player finds something you didn't think of that makes these kind of games great.
