Hi Scott,
You are correct in your assumptions. As long as the systems remain separate, you can download Disney content on the Strato and still import Disney titles on the Premiere system. Once/If integrated, you would lose the ability to import Disney titles. Thus far, Disney is the only studio to do this.
In spite of the inconvenience of running 2 parallel systems, this alone is a strong argument for some to maintain the 2 system approach. Personally, I will consider this carefully when the time comes and then decide what will work the best for my own system(s).
Hope this is of some help.
Wayne
Thanks Wayne. That was very helpful.