Lionel diesels I would love to see included is a option to switch out the swinging pilot for a fixed pilot with Kadee mounts. Like what AtlasO and 3rdrail offer. I'd have more diesels if they did. I have no interested in modify my diesels like others have.
For that matter would love to see the without major modification the option to add Kadee to the front of steamers and tenders.
Any other features not yet on Lionel products you would love to see?