I'm not sold on the feature generating more revenue, especially long term. I'm thinking some of the long time supporters who will start a 2nd team for a couple of weeks out of curiosity may realize that they're managing their secondary team just fine without supporter, and decide they don't need it altogether.
Draft issue: in neutral league you will draft a player of your natioanlity. For example. If i end the league at 16 place i will draft no1. Pole prospect. If my mate at possision 15 is a German guy his drafte will be German. This could resolve the problem of "murder" young hall of famer from neightboring countries.
I feel like having two teams won't make or break someones decision on becoming a supporter.