Id love to see a basic agenda watch app as well. A complication that allows access to your basic agenda or today views, and a simple button to hit for a quick addition of an item to either list with a voice input function.
The watch is a place to get quick acess to the things that matter in the moment now. I dont think having the ability to shuffle through projects is important, that work should be done on the phone. The beauty of agenda is the agenda view, and you should set yourself up on the other devices for whats accessible via the watch.
I love having a list on my watch when i am teaching or presenting. A short outline of points to make or things to cover. Being able to open an item on the agenda to see the notes within (an outline for instance) would be incredibly useful for me. The other half is being struck with inspiration in a moment and wanting to quickly jot the thought down without pulling out my phone. “Sushi icecream!” spoken and recorded, assigned to on the agenda or the today list.
The Things and Bear app are both great examples of a very successful watch app in my opinion. Streamlined, simple, access and input, but just with the Agenda workflow! Oooohh, it would be radical.