A little history of paint schemes should be in order. These are generalizations, experts are welcome to step in at any time and correct me.
1. GM was the diesel pioneer, but also the industrial design and styling pioneer. Harley Earl started their 'arts & colors' department, which was famous for designing good looking cars and matching appropriate colors. As part of their sales pitch for EMD locomotives, GM usually designed a very attractive and typically complex paint scheme. Think RI Rocket, ATSF warbonnet, IC Panama, Pere Marquette E7's...
2. The railroads began to loose money on passenger trains. As a result, they simplified their passenger schemes to save money on repaints. The most broke of the routes - think RI - simplified the most. However, even relatively prosperous lines like SP, IC, and C&O simplified a lot. Only ATSF and other outright pro-passenger roads like SOU and DRGW left their passenger schemes alone.
3. MILW being the cash strapped route it was, it's no surprise that they went from a complex scheme to simple black and orange to save money. Although I have to say two things about the black/orange: It always looked quite nice, much better than RI's jalopies in mineral red. And, the hiawatha logo in 1980 was fantastic - maybe the first heritage paint scheme...
Amtrak is proud to announce a new train to Florida that doesn't stink: The Floaterian. An all-star just like Babe Ruth.