Currently Players have to go to a kiosk to view the cargo inventory for their ships. Are there any plans to implement some sort of on-ship cargo UI so that Players can view their cargo inventory without finding a kiosk to do that?

It's something that they will look at; they know that it's needed. What they're unsure of is when they'll get around to doing it (again, it comes down to prioritising and there'll be higher priorities right now, such as the HUD reworks they've extensively talked about so far).