Autonumbering per Business Unit. So I can have an Autonumbering Field which has it's own sequences in different Businessunit.

Also Autonumbering should get some love featurewise. There is a very powerfull autonumbering in F&O (called number sequences) and as the system are growing together it would make sense to use those F&O Number Sequences in CE (f.e. with dual write) or to get an adequate featureset in CE.