It would be extremely helpful for Proxies to be able to prioritize the sending of some types of data. It'd be pretty cool if the server could have a way to tell a proxy "Hey, this item has a trigger associated with it" and then the proxy could prioritize sending that data over something else that doesn't have a trigger at all. This would prevent problems where huge data backlogs can cause triggers to be missed for long periods of time because data that doesn't matter to triggers is sent in the same priority as data that DOES matter.
Another option to this would be to instead allow each item to have a configured priority. That data could be sent to the proxies instead and the proxy could be sure to send that data first and only send data in a priority order.