With respect to new features:
A critical aspect of building software for users other than yourself is to involve the users in the design process. Very rarely does that ever occur with Roblox except for ultra high-level details, or only after the majority of a feature is already built and it’s too late to backpedal. I feel very strongly that there is often a huge disconnect between Roblox (product/engineering/design) and what developers want / would find most usable with respect to design. I think it would be extremely beneficial if Roblox extended a hand towards the community much more often for community input on interface, API, and feature-set design before rushing ahead with development and getting stuck having built things that without complete or significant redesign cannot satisfy important use-cases. Good examples of features where this happened was the new output widget in Studio starting with a table design that did not work well when sized square or tall, or the asset manager simply not being usable enough for many people to be an acceptable replacement for the game explorer.
I don’t think keeping developer-facing features hidden away for some big reveal, or to avoid disappointing people if they don’t work out is a good or efficient approach at all. Roblox should work on building a relationship with the developer community where things are very transparent, and the risks of that are understood by most. Even just a 3-day period to gather community sentiment about ideas being tossed around would likely offer very useful insight that prevents expensive design mistakes where either the users suffer, or Roblox has to go back and make bolt-on changes to things that are already built.
Regarding Studio still closing for updates:
There is a beta feature meant to address this issue but it currently only covers cases where Studio is launched from within Studio, not when you launch it from the website or through other means. You should support this feature request if you want Studio to stop closing for updates in all cases, or it likely won’t be seen important enough to do in a timely manner.