When using single or multiple flashes, it would be very helpful to have a real-time display of the flash level for each one in use. It can be frustrating to have to physically approach each device to check its power level.
I've had 4x TTL Remotes break on me for the exact same reason - The buttons have snapped off from the housing.
Find a better system for buttons or create them to be replaceable.
For studio sessions that don't allow a great amount of time with a subject, the ability to group a handful of lights in different configurations can save lots of time and allow for flexibility of looks. For example, the Buff Cybersync allows you to have 16 lights on a singular frequency, and group them into 8 different configurations that allow individual lights to be in multiple groups. And, to extend the idea, the ability to cycle through a specified set of groups rapidly (speedcycler) would allow a fast way to get multiple looks from a single pose by your subject (for the shoots when you only have a few minutes, and you need to get everything you can).