We have a SDL Tridion 2013 SP1 instance using Oracle 11g as the CM & CD database. We also have Outbound Email configured with a few Address Books and thousands of contacts and other associated data (mailings, distribution lists, stats etc). We are planning on migrating this setup to DXA. We would be restructuring a lot of Schemas and there would be a significant amount of data entry.
Is is advisable to setup a new CMS and import the OE database from the older CMS to this new DXA one? How would it behave if the contents (Pages, Components etc. used in the mailings) are not found in the CMS? Or would we be better off by creating a new parallel Blueprint in the existing CMS environment?