I understand your confusion, Mike. The chart that Richie posted doesn't list everything but it includes the major differences between LC, LC+ and LC+ 2.0.
I think Lionel is trying to get to a single required control system with options to upgrade. MTH has had a big advantage in that all of their engines can be run with DCS. Lionel had a few different and incompatible control systems. With the addition of Bluetooth to Legacy and LC locomotives you will be able to run any newer Lionel engine with either the Universal Remote or the LionChief app on your smartphone or tablet. That will give Lionel a big advantage. New hobbyists won't need a $300+ Legacy (or DCS) system to enjoy their trains. Eventually the LionChief app MAY be upgraded to the point that it surpasses Legacy.
I think LC+ 2.0 is Lionel's attempt to offer traditional size trains with many advanced features to the conventional and traditional guys, a very large segment of the O gauge market. Bluetooth allows that large segment to add Legacy with bluetooth locomotives to their roster.
