One suggestion I would like to make if it is not part of the plan already is a "yard mode speed limit."
I know you can set speed limits for engines on the Legacy remote, but it would be nice to have a seperate "Yard Mode" specific speed limit. This would only work on the iPad and only when in the "Yard Mode." This way, you could set it at a fairly low number and while using the iPad slider bar you could keep an eye on the engine while not worrying about going too fast and smashing into your cars. Prefferably the "yard mode speed limit" would be set on the ipad and be unique to each engine, that way I could have a fairly low number for my legacy diesels and a higher number for something like my track mobile. I think this would address one of the only problems I see with the iPad, no tactile feedback like you get from the remote. However, I think iPad addresses the problem of the legacy remote, hard to remember what switch is what number. just my 2 cents, happy railroading!