More steam in Frisco, MoPac, and T&P I'm not asking for obscure roads, like Mississippi River & Bonne Terre: these three are major systems.
I don't believe a Russian Decapod has been done in 3-rail, but many roads had them.
We need more scale-sized steam without all the gimcrackery that drives up the price and down the reliability. I'd be delighted with TMCC or even just conventional, and please spare me the crew talk/cab chatter. No need for steam leaking from every possible orifice, collapsing coal piles, waving engineers, or flickering lights. In fact, delete operating class lights and markers: jewels work fine. A moderate level of sturdy details without having the little valve wheels turn and other assorted filigree that doesn't survive the trip to the store much less actually putting it on the layout.