I kind of missed this but awhile ago shinyqquagasire made a tool that installs homebrew onto the WiiU. I haven't found a thread for it yet, I probably should of looked harder. I had to google it in order to figure out what the hell people were talking about.
What I am gathering is homebrew that is in the .woomy package is installed with this tool.
How to make a .woomy package the readme mentions:
I haven't used this tool at all, but it seems different. I'll try and follow up once I figure it out.