As a Roblox developer, it is currently too hard to teleport players back into a private server that they have purchased.
If Roblox is able to address this issue, it would improve my development experience because it would allow for players in private servers to seamlessly be transported back into those private servers after hotfixes get pushed.
Motivation
Nuke Simulator, and many other similar games use a technique that is usually referred to as soft shutdown, in which the game will detect a shutdown and then move players into a new server with their location & game state preserved.
Our game often requires hotfixes to be pushed in the middle of the week, ideally we want to get bugfixes out as soon as possible. But, this disrupts private server users, because they are forced out of their private server and into public ones. This has contributed to private servers being purchased more infrequently in our game due to how much it affects our players.