I'd love to have the ability to priortize certain campaigns over others. Even if there was a way to say here are X number of slots that you can designate ranking campaigns. I've got some triggered campaigns that are key to our lead flow for generating instant MQLs that can get stuck below things like preparing batches or other lower transactional triggers - would love to influence what runs first.
Perhaps even campaign classifications for the admin high, normal, low.
Just because some things cannot wait for a nightly batch...