You don't necessarily need a CAD degree to get a PR.
US degrees open up doors to get a PR through express entry.
2 years is a bare minimum for MBA candidates anywhere usually. Adding 3 years STEM OPT MBA experience and then if you don't get an H1b on third attempt, you can then apply for a PR with your bachelor's degree, your master's degree and high skilled job category with international experience and cracking an easy test called IELTS. There are possibilities that even Rotman is aware of.
Needless to say that people who qualify for an admission in a US 10-20 (usnews rankings) must produce a strong case in favour of "Why Canada"