I did not mean to discourage anyone with my "wall of words" from trying to buy and ship a California Clarity. I was hoping by being detailed I could help someone else do better than I did by learning from what I did that worked, and from what did not. Having done it, I would do it again.
I'm sure that many people will feel that the effort that you went through, which basically was just a bunch of emails and phone calls, was worth it to save $2,000. Others won't. The more information the better, those who probably wouldn't do it anyway won't read all of your post, those who are interested in possibly saving a decent amount of money will likely pore over every detail, and like you said maybe get through the process a little easier knowing the details of your experience.
The unknown dynamic for 2020 is whether some parts of the country might start seeing cars on dealer lots in their state, and possibly some discounts although it's too soon to tell. The east coast received a bunch of 2019 models early last year, but then they didn't receive any more for the rest of the year. We kept hearing that many if not most of the cars they got in early 2019 sat on the lot all year because east coast dealers would not come down on price, as Honda apparently didn't offer any dealer incentives there like they did in 2018.
South Tacoma Honda in Tacoma Washington has eleven 2020 Clarity sitting on their lot that they just received, seven base and five touring. I think they started with twelve so they have apparently already sold one. Presumably someone can get a discount from MSRP there but we don't know that for a fact yet, especially since neither we or probably even the dealer know whether they will get any more shipped to them this year. Honda may decide to keep it to 7,000 cars like they did last year (compared to 24,000 in 2018) and they may ship to other states based solely on how many cars are not needed in California.