So we played this scenario tonight, and the same thing happened. After Joe Diamond having murdered Gloria the author with a sledgehammer, I get to draw a new character as we are still in step 2 of the time limit. I get to choose between Kate and someone else, and go with Kate after eyeing her special abilities. I know she's good in Arkham Horror, so I pick the flux stabiliser and, after some doubts, the Test Theories card. In the next round, the keeper tries to spawn a witch on me, fails, tries again and succeeds only to realise he can't spawn it where I'm standing. Therefore, he chooses the next room which happenes to be where Gloria lies dead with the Key to the next area and a tome. Undaunted, I roll for Test Theories.
As we were playing scenario 5, there were 6 total clues out of which we'd found 3, although we were only two players. Hence, I get a rating of 8 on the roll. Wanting to make sure, I ask if it's a skill check to which the keeper agrees it is, and so I add my luck onto the check again and then roll... a 9. The keeper then declares that it's game over, since I now know we just need to get out to win and I'm standing right next to the entrance. Hilariously, the other player had the "Loss of Will" card on him and thus killed the witch in his space (that spawned from me) and then happily ran into the freezer... only to realise that he died from doing so, which meant that the keeper won and he still lost, even though I would've won on the very next turn.
All three of us agreed that this ability seemed to totally screw over the game, especially in some scenarios like this one. Even the Flux Stabiliser is too good here - with it, I can just camp out in the foyer until the objective is properly revealed, and then take one step outside and immediately win as the keeper is unable to spawn anything (which in this case is only witches) on the room where I'm standing. We discussed this at length afterwards, and didn't really find any solution that felt quite satisfactory - because even if only Kate gets to read the objective and it's not revealed, it becomes a very strange game of trying to mimic her movements and/or directions, and if she doesn't have a face-down card (which I didn't) you can be sure she's not a traitor and hence it's a good idea to do precisely what she tells you to. At that point the game becomes essentially meaningless, and thus we started repacking it in the box to stow it away amongst continued discussions.
Then I stumbled onto this thread, and judging from the amount of views it's gotten we're not the only ones with this issue. The game is new and thus most likely the latest version, and yet we couldn't find either any errata to the ability/card or any sort of FAQ on the matter, which bothers us quite a bit. Everyone seems to hate the ability and to have come up with their own house rules for it, ranging from that it can only be used after a certain amount of clues have been revealed to that she and only she can read the objective which is then not revealed, but aside from outright banning the card and/or character, none of them address the fundamental issue with how the ability is supposed to work and/or interact with a number of the printed scenarios, even after several years. And she's even included in the base game, so it's not a question of newer scenarios or characters screwing up the game balance as can sometimes be the case with Arkham Horror if you're not careful.
So my question is simple: How is this ability intended to work, and why is there no errata/faq anywhere on the whole wide web to address it? Answer much appreciated.
Sincerely, Concerned gamer :/