Limited Rework functionality,
Poor functionality if you need Catchweight functionality
Process controls in logistics/procurement and manufacturing are controlled by order type in M3, AX has limited controls by order type etc.
Limited Allowance for shrinkage etc. in production
Limited Variance Reporting and Actual Costing functionality
Limited functionality fro managing potency of a raw material
Limited cross warehouse sourcing suggestions functionality
Limited family forecasting functionality
Ease of development within integrated development suite.