Likewise. One of my early first mangas that got me Hooked only to stop being translated and only recenty "Remembered" it and took a week to find.

So many plots were going on, to me The Demon Castle arc was where it started to get complicated. Real Life events affecting the major story and so many new characters who stories were thrown in and suddenly, they were gone.  Major villian just up and leaves the country and the Old Sage guy dies...leaving our heroes AI to take control along with "His" Yureka.  Personally I would of liked to see one last moment of Lotto/Rotto? together with Yureka and end with the real life characters hugging or kiss on the cheek.  Something.

Basara was done dirty. He was shown as a threatening character, did his job/Off screen defeated/ came a back and they softly explain how his "power" worked by a sword fairy AI and they disappeared again, only to DIE!? at the final meeting? Another was the one (singer girl with long hair) what was with her connection with Ban AI?  I got lost with her side plot. 

It was one of those, Its being axed and they got to finish the remaining story/arc quickly. He** we got hints of the main guys father...was he importaint and the mom was da**! o.o But I guess it was worth the ride.