Lane Splitter:
-as opposed to the normal "Splitter" the "Lane Splitter" divides the items from each side of the TransportBelt onto two other TransportBelts;
-the "Lane Splitter" should have a simple interface that would allow the player the freedom to select if he wants the item to be placed either on the right lane or the left lane onto the new TransportBelt
(simple example / plz ignore the blantant photoshop)

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*Logistics vs Basics:
Although I do support the addition of more logistical type items I urge you not to overlook the marvelous designs that players can create or might create in the future if the basic functions and items of the game are not overlooked. By overlook I mean you should not forget the simple transport belts and inserters when you think of adding more types of items because I myself (and others, I think?) have the best of fun when designing complex factory modules that produce a specific item or more only by using the basic mechanics of the game. As a simple example I added a Iron Plate,Copper Plate input --> Science Pack 1, Science Pack 2 output factory module (the design is raw, and the spaces you see there are meant for further scaling of the module)

So you might want to think about what people might be able to do with some simple to implement items like say for instance a 3 space reaching inserter, a inserter that has the input / output in a 90 degree angle (instead of a straight line), or a belt that does other simple but effective things. Point is, there is a reason to think about all aspects of the game, not just end game content because you might never know how people find ways to have fun with a game.