Posted this addon on official community discord server of Touhou 12.3.
Here are all the comments that accumulated in few days:
"Massacre on Mt.Ooe damage seems too low, DnD equivalents already trigger without the risk of missing, can't it be like a 12d12 or higher damage?" someone else said to that "it could probably get a huge boost to damage and frequency if it didn't cause indefinite stun"
"lol whiplash for the bard having an almost useless lvl3 feature and an exceedingly busted lvl6, oh right, this is 5.5, so animate objects doesn't just instantly delete an encounter, still probably too strong a lvl6" Maybe this guy is right buuuuuut I think it's alright for bard to be able to do some impact via summons. Like making a large piece of wall alive to protect the party from some bullethell.
That's all that I've got in past 3 days. I still have something to tell though.
My DM said that he really liked the idea of patchouli wizard subclass. DnD surely lacks specialization of this kind.
On the side note, I think that Touhou fighting games offer some interesting ideas. For example, been able to use melee attacks and cantrips in battle. Just like in something like Touhou 12.3, where characters can use some ranged cantrip like magic that recharges in about 6 seconds (the time of the round).
While talking about figthing games, I think it would be great to add more martials to the subclasses, because fighter don't even has one! Although I understand the sheer weakness of all martials in DnD, especially in high magic setting like Touhou where everybody can fly. Yet, I think adding more melee related subclasses could be funny. Where the subclass itself will give ranged attacks. For example, Meiling (The China girl) from Touhou 12.3 where her kicks make rainbow ranged attacks. Would love to see her in this addon as an Asian monk subclass.
Additionally, magic item suggestion. An air purifying orb (The one moon rabbit lost in Touhou 19 story). This magic items can help Pure Land origin feat to stay longer on moon rabbits or lunarians while in non-pure lands. It can have variety of rarities where common orb can barely make you pure, while uncommon or rare has some other benefits. Like purifying poison gas in a dungeon of Touhou 13 (Due to many dead bodies producing corpse gas). That could be funny. I think something like this is a requirement for those fellas to even attend in parties of adventurers.