I'm not sure if this is already implemented and I'm just stupid, but I would like the ability to absorb developmental territories whenever I no longer need them.
Say for instance I'm a US based promotion and I open up a Canada based promotion, and then get big enough to where I'm popular in both US and Canada, I should be able to absorb my Canadian branch.
Maybe not have the importance or popularity transfer over, but just the ability to passively "take over" developmental territories would be a good idea.
Like maybe just make it to where you have the option to "take over" child companies, it'd be simple.