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As mentioned in the design talk, we have a testing extension for the Activities button refresh.
Try it out and let us know what you think!
https://discourse.gnome.org/t/activities-button-call-for-testing/16407
I know you're making a joke, but you can install the extension today to get the proposed feature. (How to install it is even mentioned when you follow the link.) There's no need for waiting.
It may not make it clear just by looking on it, but once you click on it or create a new workspace, it becomes a nice visual to help you remember which workspace you're on and which ones you have available.
Pretty much everybody using a window manager already uses one like this.