In case you don't already understand this, re-initializing your Switch will not suddenly make it unbanned. Your Switch console has a unique certificate that is banned on the server-side, you cannot remove this ban from the server. Your only hope is that a future CFW will be released that will allow you to override this unique certificate. Currently this does not exist, and it might not ever exist, but even if it does get created, you will still need a valid certificate from another Switch that hasn't been banned. And if Nintendo sees multiple copies of the same certificate online simultaneously, there is a good chance that they will ban that new certificate as well.
So you're basically screwed, unless Nintendo neglects banning for shared certificates (like public seeds currently in the 3DS scene...) or you buy a "private" Switch certificate from someone else (this also happens in the 3DS scene, and you really have no proof that they haven't sold that "private" seed to multiple people). Or, you could buy another Switch tablet and rip the certificate from it, but at that point you might as well just use that other Switch tablet.