This change in separation between personal and business needs to be optional. I understand the business requirements for doing so, but thats not how most people operate in real life, or have been using Evernote for many years. I think you will lose a lot of people over this, as it wreaks havoc on too many existing workflows. At the same time, I wouldnt want to see a dedicated Evernote Business and Personal applications either - that would be a complete nightmare. Please consider how this can be achieved without it being mandated so that the majority of user requirements may be accommodated.