As one of Vuo's developers, I work on Vuo's engine (the thing that makes compositions run), work on nodes, and write documentation. You'll see me on the forums answering people's questions about Vuo.
I enjoy using Vuo to make live music visuals. My hope for Vuo is that it will grow into a community of people of diverse backgrounds and identities making lots of different artistic, useful, unique, goofy, beautiful, crafty, wonderful compositions.
Estoy practicando para ser competente en español. Si publicas en el foro en español, trataré de responder en la misma manera.
For item 3, I think a good way to accomplish that would be with the separate feature request plus Ability to create composition-local subcompositions. You could group the nodes into a subcomposition and give it a meaningful name, which would be displayed when you collapse the subcomposition node.
If you just want the event from Fire Periodically to go into the subcomposition, you can make an event-only published input port. In the example below, I created the published port by dragging a cable from the Count node's Increment input port, holding down Option to make it event-only, and dropping it onto the published inputs area. Each time Fire Periodically fires, its event goes into the Show Counter Window node's input port, and inside the subcomposition, goes to the Count node's increment port.
If you also want to send the data from Fire Periodically, you can publish a Real (number) published input port, as in the example below. In this example, each time Fire Periodically fires, its event and data (the seconds since the composition started) go into the Show Number Window node's input port, and inside the subcomposition, go to the Format Number node's Value port.
Hm, the "Change Color with Button" example composition still works for me. Have you connected a cable to the Make Button node's Rendered Layers input port? If that doesn't solve it, could you post your composition?