We are currently engaged in the implementation of S/4HANA in an engineering & project context. They both have internal and external projects and they require a multi-level WBS structure (L3 to L4). As far as i can see you can only create 1 level in both the internal and external projects apps - this is really not working for them. I recognise that you can the classic project builder but then all the apps become useless ... so to me this is not really a trade-off. What is the reasoning behind this over simplification of project structure and is there anything foreseen in the near future on that? Why can we not extend these projects in the project builder?