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

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.

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

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.

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

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

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.

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.

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

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

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.

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

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.

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

Title line - In OBS studio you have the ability to add Text (GDI+) which allows it to read from a simple text file. This works wonders for overlays and items like that as it allows the streamer to showcase their most recent follower, donator, and subscriber. This is a genuinely decent tool for viewer engagement.

When adding a game capture in OBS, SLOBS, or XSplit, there is an option to allow transparency. This is a useful feature for standalone programs designed to run as an overlay.

It would be cool if we had access to the live dashboard within the app to manage hosts/raids, run ads, see active extensions etc.

I think for easy on/off or other thinks a option for Group 2 or more layers in a design. And for easy use too, need a multi-layer selection (f.e. move 2 layers at same time.