I can't explain the 'learning process' thing any more than saying that everything on every vehicle is pretty much computer operated these days, and if you pull something like a transmission apart & re-assemble it, because something has changed in there (no matter how tiny the change was) the computer that operates it needs to 're-learn' how to safely operate that transmission, so there's meant to be a computer routine built in that's called a 'learning process' which allows the computer to do that before it destroys the transmission again by moving a madly spinning gear at the wrong time, or maybe a smidge too far/not far enough. It's just the computer version of you trying on a new pair of shoes and walking up and down the shoe shop once or twice to see if they 'feel' right - only in your Spyder's case, apparently they can't get the computer to do that, and the computer apparently just
WILL NOT do anything more until that particular process has occurred!
However, that aside, we've seen here on the Forum numerous times before that even just mentioning
that bit I've highlighted in the quote of your post above,
the attorney &/or legal action thing, is a pretty much
sure fire way to get ALL the work on your job
INSTANTLY stopped, the whole job slid waaaaayyy to the back of the heap, and then either forgotten &/or buried in tons of legal paperwork!

And if/when it ever gets to litigation, they've got vastly greater resources to fight it, and compared to you, a virtually never ending supply of lawyers and $$ to fund their efforts to drag this out and maybe even bankrupt you in the process!! And at the end of it all, there's a good chance you
STILL won't end up with a fixed Spyder in any reasonable time frame, cos no-one has dared touch it since the very first moment you mentioned going to your attorney!!
So yeah, do the NTSB complaint thing, but if you want to ever get your Spyder fixed and back without costing you major time & $$, then going by what we've seen reported here in the past, don't even
THINK about, let alone
MENTION attorney's/legal action!!
Just Sayin'