While the area is a very spooky and cool looking area, it's unfortunately one of the more underwhelming areas for a few reasons, so I'm going to give some ideas on how to fix it! : )
List of fixes:
1, Manor Macabre will appear as a permanent area instead of just being a temporary dungeon. Part of the reason I strongly dislike the quest gimmick for Miitopia is do to the fact that some areas like Manor Macabre go away after completing a quest for the area which isn't fun in the slightest. Besides, it being quest exclusive creates a Plot Hole!
So there's a Vampire Mii who wants you to help get rid of a Ghost from the Mansion so they can sleep there peacefully, but after you beat the quest, it goes away (and so does the Vampire Mii) and the fact that it's possible to get another quest to the Mansion and encounter even stronger monsters just leaves me with a big question! Did the Vampire living there get attacked by those stronger monsters and run away, or is the other Mansion quests supposed to take place in other Mansions that just so happen to appear right where the original was??? : /
I suggest they make a temporary dungeon INSIDE Manor Macabre for other quests (Similar to areas like Citrus Cave, the Dark Lord's Castle, and The Sky Scraper) rather then having the entire Manion be quest exclusive.
2, PUT THE TARANTULAS IN THERE! So according to both the Monster Journal and the Wiki itself, Tarantulas appear in Manor Macabre, but yet I never see any appear! And I'm not sure why they wouldn't either when Tarantulas would fit perfectly for a Spooky Mansion (Along with the Paintings, Ghost Mallets, and Skulletons)! So yah, this had me confused.
3, Buff up the Pop-up Puppet Boss. Plenty of bosses you fight before the Pop-up Puppet are fairly strong and have over 1,000 HP, but yet this specific boss only has 720 HP. Point is, you'd think a boss that's fought to get a Powerful Job (The Vampire Job) would be harder, not easier! Also, please let players be able to refight the boss if they want, becouse as it is, it's only a one-time boss and then it's gone forever.
I did however already made a list talking about easy bosses that should get buffed, including the Pop-up Puppet, just incase you'd want to check it out!
The Top 13 easiest bosses in Miitopia that should get buffed. | Fandom