I read, that from release R69 there will be possibility to DISTRIBUTE expense invoices to responsible roles and users based on multi-dimension routing configuration.
For us this is a very long awaited addition! We have been missing so much over the years! Good job! :)

There are two more suggestion for future upgrades on same topic:
1. Also "Supplier" could be one variable to choose from - so it woudl be possible to choose Dim1 + Supplier1 = Responsible1 and Dim2 + Supplier1 = Responsible2.
2. Expand multiple routing not only to distribution rules, but also to NextAuthorizerPerspective & user superior configuration, so it is possible to use combination of Supplier+Dimension also for "Four Eyes Principle".