I dont't think this is rushed, the other story of the same author also has this type of ending.The ending felt rushed. The whole manga was fun though. I'm looking forward to your next release. Uramiya sequel next?
I wondered that too but safe to say she kinda died, sacrificed herself by forcing herself to submit to the doll and probably become a spirit or some shit lol.Okay so where's Shizuka? Or is the mangaka planning a sequel?
I mean, from what i read on the author, he has this nasty habit of shoe horning shocks on he ending solely for their own factor.I wouldn't call this a bad ending per se. It's nice that it didn't went the ass pull way where every "good" guy actually lives in the end and as for the fact that the doll is still there, it could mean anything, it could mean that the doll will act as a punisher to like the next generation of other random family that doesn't know how to properly act like one rather than targeting Mariyama family specifically. It could also mean that she will always be spying on them and take whatever opportunity to send them back to the miniature Amedate if their family were to not act like an ideal family. But I would like to believe that this actually ended on a good note as the Mariyama family is free and the fact that the doll exist is just to act as a shock factor in addition to the other point I just said.
Edit : Upon reading back, seems like I have to take back all of the stuff that I've said guess this doll just won't give up huh? Well a second game does happen "off-screen" judging by last few pages but I do believe they can get through it fine from the fact that Kosuke ensures Maimu that they can get through it just fine. This also serves as a fact that the author is ensuring us that the characters would also be fine
Having the second game told in a sequel where the new Mariyama family would eventually end it for good and evil doll is disposed of for good would just be as cliche as the one we get.
All for all, it's about the journey not the destination, I myself is quite disappointed with the ending as well but the whole read has been fun. I look forward on reading more of whatever manga this scanlation team or author work on.