It doesn't matter if it only works 10% of the time if you figure out a way to stop signature checks and reverse engineer the Cafe OS enough to build your own channels you can establish permanence.
For example, it wouldn't matter if the Twilight hack for the Wii had only worked 10% of the time because you only need to run it once.
It saddens me that they are not releasing this as-is. Everyone so far has been open with sharing and this is something that I could actually help with. :/ Hopefully Marionumber1, NeKit and Hykem will continue to do their open source, well documented work. Also, Marionumber1 said he locked himself out of his own exploit by updating his console to 5.0 so we really need the Wii U Common keys to decrypt binaries from CDN->analyze binaries manually or via ROPEME or some other automation tool->modify ROP chain to deliver payload to 5.0.