With Corecon being purchased by sage and now integrating with Sage's ERP's the financial portion is not necessary. The erps are excellent job and procurement management programs already, the financial management in SCM lost its value. Focus on making the areas where the ERP's are lacking strong, such as the documents and correspondance. Make the submittal and RFI processes more streamlined etc.
These ERP's are not quickbooks and are not lacking in funtionality.
If anything, make the ERP data available to some specific reports in SCM so that PM's have the necessary data available in the field. Make a simple integration to pull a project from the ERP.
Atleast make this optional for the ERP integrations, i understand the necessity for it when it comes to a Quickbooks integration.