That is going to be a logistic and training nightmare. And then to start mixing and matching systems as well - ugh.
If they in the end can more or less simplified to just 3-4 system suppliers it is already great. Indonesian Defense procurement already know for years has patch up procurement projects. Politics and Marketing Lobby can influence that, especially when changing to new administrations.
If they can stay with current trend of mostly goes with Euro system of Aselsan and Leonardo with occasionally getting Thales. It is already (for TNI practices) relative better procurement process. TNI can not have 100% homogenous/uniform suppliers system. If they can at least have more than half uniform procurement base, it is already good progress.
Personally for me, if that means for future more then two thirds of weapon systems from Turkiye, Italia and French, then it is already relatively better situation. More domestic industry partnering with less suppliers,it is better for domestic supply chains.
However realistically it is also still potentially smaller procurement from South Korea, Japan, US, Russia and China. 100% homogenous systems will never happen for TNI practices. That's why Indonesia MinDef betting high for effectiveness of Link ID, just like Pakistan and Egypt for example also work hard to get common data gate way.