A splash screen for use when you are not actively using teams.
I find that I often have teams on my screen when I am not using it. This forces me to have either a past conversation open or content from a random channel displayed on my screen. It would be nice if there was a splash screen that could show useful information and could quickly show notifications as messages come in.
A splash screen is also a necessity for opening up Teams in a boardroom (e.g.) or any setting where peers are in the same area. If Teams is going to eventually replace Skype for Business, a splash screen is a necessity.