So if this exploit is released, we will be able to use a 9.2 .cia to downgrade our 3ds. So then we can install the gateway ultra to downgrade to 4.5 and install emunand and we would have kernel access?
There isn't really any point to that.
What we need is that the hack allows a full system breach, so we can install a proper Custom Firmware, to avoid having to start a application to run Homebrew.
That said, most of the homebrew devs are butthurt over the fact Custom Firmware will mean the core priority is loading ESHOP games, normal games, and a live injector to the emulators. And emulators is a priority after that.
The butthurt stems from the fact, we know from earlier homebrew scenes(Wii, PSP) that once Piracy is working properly, the demo apps people make will be ignored, because their quality is questionable(most of them). And whoever is making homebrew games is eiter over their head(writing custom engine), has no understanding of deving(no content creation tools, just convertors and .txt files), gets no recruitment due rare skills, bad at making progress, feature hell, or any other reason.