Yes. In most cases, adding PlanAutomate Project Business Automation as part of the upgrade to Dynamics 365 Finance means you can retire many of the system modifications you previously had to include to make Dynamics AX work for your company.
The out-of-the-box capabilities of Dynamics AX in support of project-centric companies are so poor that project businesses have been forced into extensive modification work or moving central workloads into third party point solutions and Excel spreadsheets. Adding PlanAutomate PBA means that significantly fewer modifications are required and that you can retire most of your third party point solutions, including any interfaces between Dynamics AX and external applications you may have developed.
Whitepaper: Dynamics 365 project management and accounting vs PlanAutomate PBA
Eliminating modifications is an essential exercise as you upgrade to Dynamics 365 Finance where updates from Microsoft are automatically applied up to 8 times per year. If you have custom modifications, it is your responsibility to validate that the modifications work as expected after each Microsoft upgrade. With the PlanAutomate PBA solution, the validation against Microsoft updates is done by PlanAutomate, requiring no effort from you.