Similar to the service offered by many other twitch alerts/tools services such as StreamElements, StreamPro, etc.
This would allow us to consolidate all our overlays on the platform, loading them via browsersource. This comes in handy for organization and to have everything on one place. Also, if an editor could be added (similar to StreamElements) that would be awesome, allowing even more fine tuning of alerts placements and such.
I would go full in with Streamlabs if this was implemented.