By all means, go right ahead!
And fair enough, it’s definitely a tricky list to pin down. I don’t know that I’d call myself an expert, but I’ll help to the best of my ability I’d say if you use that list, you’d go ahead and include the proposed changes, but it actually looks like there were 8 more kanji than in that proposal that got confirmed in 2010, judging by the Japanese Wikipedia page.
As for order, the English and Japanese Wikipedia pages show the additions in a different order, so maybe the Japanese one would be alright? Though the following page doesn’t have the full Secondary school list. Lemme go look for it and I’ll come back and edit when/if I find one. What kind of things are you looking for/considering when you look at the order? edit- the additions start at the " 2010年の改定" section
So I just found this table with the full list, and it can be sorted by both readings and school year (S = secondary school), and it’s the same table as is on the Japanese side of the site. Unfortunately, I have no idea Gonna move this to a reply