I haven't had a problem with Excel automation, its working for me with SQL 2014.
I found a workaround for applying my macro to format a document. Under the Excel Destination Plus object I changed the Existing Data option to Overwrite. After the document was created for the first time, I formatted my spreadsheet. From that point forward, only the data is updated and the formatting is retained. I don't even need a macro to format anymore.
Is there a manual for SSIS+ where I could read about the functionality of all these tools? Thanks