If they did this engine as a Master Line I would probably get one.
I just ordered a Lionel LEGACY Chessie GP9 from Charles Ro that should arrive in the spring plus I have 2 Lionel LEGACY Chessie SD40's from the 2015 Signature Edition catalog that are supposed to be delivered next month according to the shipping schedule. These 3 engines will do it for my big ticket model train purchases this year and probably the foreseeable future.
I'm sure these Trainman U23B's are nice. They should be after 3 years in the works.