App stores from different countries

I live in US and UK and use apps that are only available in their respective app stores. In the past I could update my iTunes account/address and credit card info to show I'm in the US and point to the US app store to get updates. Then I could change my address and cc info to UK and use that app store - with app from both stores on my phone. The latest updates have locked down the ability to change your country on an iTunes account, thus making it impossible to download or get updates for apps in other stores. The world is smaller and there are many multinational users who I'm sure face this problem. What is a clean fix to get the apps we need? Why can't there be just ONE app store?!! The one workaround weI'm really getting frustrated here.