You need to ensure that the New Outlook can be fully automated as can be done with the current version and that existing code continues to work 'as is'. There are millions of tools that rely on VBA automation on a daily basis to send emails, create appointments, tasks, search/find items, ...
Furthermore, we need existing Outlook coding to continue to work. I have countless clients relying on code in Outlook to gather information, start e-mails, custom ribbon code, others using With Events, ....
It is CRITICAL that you not break these existing mission critical tools (Access, Excel, Word, PowerPoint, VB, ...) that use Outlook automation, or in Access specifically things like SendObject, etc... continue to work.