
Sad to say I agree... the way the story was set up, I thought Clen and Alicia were gonna bring baby Luna around the country and raise him to be a great kind/warrior to eventually take out the big bad as a trio, maybe encounter the other demon lords on the way and shape his future, but, uh, yeah, instead they go to magic school and oh? Lookie here, team-up time with the other demon lords who just so happen to be here too! Wow!
It's hard to say if this was the author's original intention or maybe the story just didn't get popular enough in Japan to warrant a long run series and they had to make due with a shorter serialization... but yeah, agreed, the vibe kinda hit a 180 for me too :P still cool concepts and all, but still

Good point about probable pressure around serialization. I also had a feeling that the story is reaching its climax too soon... hopefully it's just an arc and that the series will continue past it.
Yeah, great concepts and hopefully, we'll get out of school and back on the road with the key figures.
I have to admit, not only am I missing baby Luna, but the vibe of the manga changed drastically to me by chapter 28.
I also can't stop my eyes from rolling at all the gakuen cliches