This might be needless to say, but I think the overall difficulty of Ultimate's Classic Mode really depends on who you main. I think the closest I've gotten was Zelda at 9.8, and I've heard it's easiest with her, but idk.
I'm not sure if it's been mentioned here already (I didn't really scroll through all 16 pages, oops), but I'm actually pretty pleased with how beefed up the level 9 AI's have gotten! I've always felt they were... for a lack of a better word, lacking, in Smash 4. It's nice to see that they're...
Just recently I started to watch the changes in Final Smashes and I gotta say.... I'm massively impressed and quite pleased with what I've seen so far. =O
(meaning the changes in Final Smashes that were announced back in E3)
I do personally wonder if there will be even more unlockable characters this time around. I don't really have the faintest idea who, but Nintendo could always add some additional characters (and even more stages!) as DLC, much like they did in Sm4sh.