I actually misread the description for the Spastic Hummingbird Wizard and thought it applied to all investigative results, but I find your rebuttal interesting and I still don't think it's completely terrible.
As do most investigative roles, especially the cop. Hiders and IC's are also inherently pro-town.
In post 64, Kagami wrote:A miller will likely claim early, so it can confirm that player as innocent, and anyone else it would get a positive on is likely a godfather.
The problem with it is that it's inherently deceptive. The existence of the hummingbird wizard implies that these is a GF in the setup. If there isn't, then he, and the rest of town after he flips, will be looking for a GF that doesn't exist.
If there is a GF, then it's the GF who is unfairly deceived. He believes he is supposed to draw an investigation, when he is in fact highly vulnerable to it.
While a lot of players will claim miller early, I think you're disregarding that some players actually won't claim it and hope to make it through the game without having to worry about it. I also know that at least one or two players have openly admitted to preferring this route as you may get to skip the whole "Is he actually a miller or gambiting scum?" discussion.
While it will imply the existence of a miller or a godfather (and I guess any other role that may affect alignment related investigative results whatever those may be), I don't think it implies that one or the other has to exist as long as you have at least one of them. Granted, a lack of a miller claim will imply the existence of a godfather, but if the Spastic Hummingbird Wizard decides to claim or softclaim early, the godfather can take this as a cue to claim miller instead.
As far as a GF being deceived, what are they being deceived about? Until the town becomes aware that a godfather or a miller should exist, the godfather should still be playing like a godfather. Also, as long as you're compensating the scumteam in return and trying to keep the game balanced elsehwere, it shouldn't become that big of an issue since you're just changing the way the role interacts with the other roles in the setup, not how the players should be playing them. A cop that can only find the godfather should also have a lower chance of finding scum than a regular cop since there's only one scum member it can identify.
I'm also not fond of players trying to draw investigative results as a godfather and don't particularly care if they get lynched for it. It's rewarding if they can avoid the lynch, but it's something that doesn't bother me that much if it ends up backfiring for them because town would have had enough reason to just lynch them outright.
