I love the new Lionchief Plus system. Simple, dependable, good control, and you can always run conventional, too. I like the one-remote/on-loco concept.
While I run mostly scale now, my favorite Lionel loco ever was the Legacy Lionmaster Big Boy: semi scale or not it could mix with scale - it had to be right up next to a scale Big Boy to reveal its non-scaleness, so to speak - and it had acceptable boiler stick out on turns: among scale articulated locos, only the CC2 even comes close. I wore one LM BB out running it maybe 4000 hours, bought a second on the used market and ran it until it gave serious problems. I've forgone buying a third because I don't want to inherit someone elses problems.
And you don't make them any more.
A Lionchief Plus semi-scale Big Boy - the Lionmaster Big Boy recast as Lionchief Plus - would be the ideal model loco as far as I am concerned.
Put it on the market, made to order or whatever, and I will buy three. I promise!