Sometimes I'd like to mute specific programs for a stream (i.e. Discord, Chrome, etc). It'd be nice to allow users to adjust specific program volume/mute programs entirely without having to setup an external program.

Same as some of the other default layouts, "starting soon" is an essential layout. It would also be an added bonus to have a timer built in, since creating your own is really daunting and can get a bit too technical for the average new streamer.

Allow us to import scenes etc over from OBS so we don't have to make them all again.

Would be nice to see maybe a chat overlay for those with single monitors. Something similar to what SLOBS has just a transparent pop-out chat that can go over the game but not hinder your view too much to make it a little easier for those with single monitors to read chat

Scene transition is definitely needed with *.webm support for custom stingers.

Streamdeck integration would be a huge plus here

It would be nice to be able to duplicate a layout/scene so I can just repurpose it a bit for another usecase (e.g. I love the default "be right back" layout and I wanted to use the same thing to match a "starting soon" layout, but since the duplicate feature wasn't available, I had to try and attempt to recreate the same layout from scratch. Continuity is very important for branding.

For my startring soon, brb, and ending stream screens i use a loopable video background on my cast. This would be a great feature to have on Twitch Studio.

I was testing out creating a layout/scene and just wanted to see the difference between one thing and another thing visually. I resized my object and immediately decided I liked it the other way better, but I couldn't undo so I had to try to get it back how it was and I just kept messing it up so I gave up.

Setting a goal while you're streaming like donations, bits, charities or maybe just followers

Flipping the webcams across vertical and horizontal planes, and the rotation CW/CCW

16 Windows fonts that all look the same, please add Google fonts or a way for us to add our own?

Option to disable non essential features (like video preview, visual effects) to boost performance

A option in text layer for stats (as viewers, last follow, last bits, best biter or watever) or other layer with one of this stats.

Integration with 3rd parties softwares like Spotify, Steam, Battlenet (enable to show current music, current match info of a certain game)

I'd be really nice to have support for NDI sources for people that use it

Being able to insert custom CSS styling into browser source layers would be incredibly helpful, especially for certain Twitch Extensions like Sound Alerts that have software components.

Ability to change:
Focus, Exposure, Gain, Brightness, Contrast, Color Intensity and White Balance
from within Twitch Studio.

This is so annoying when you want to show something on your phone and either your focus or your white balance doesn't let the camera see it. So right now you have to go into your camera software and change it from there.