Alright just finished Dream Drop Distance. That's the 7th game in the series. I'm almost caught up. Basically just 0.2 A Fragmentary Passage, and Watching the KHUX Back cover movie, and then I can finally play KH3. This game was a lot easier than Birth by Sleep, and plays very similar, replaces the DLink thing with the new digimons thing. And brings back the ability to deflect attacks with your own attack, instead of having to use the block to deflect. I think that's a big upgrade. The Dlink system was kinda bad, whats the point of using a different command menu, when I already set up my own command menu that I already want to use. It was only good early on, because using Aqua gets you cura as Terra and Ventus early on. When you play as Aqua, there's no good Dlink to choose. I would say Birth By Sleep is the hardest game since KH1, the series was only getting easier and easier with each entry until BBS, and then BB...
OR: How I Learned to Stop Caring and Became a Simp