I might mess with his sight range a little in the update. As far as SUNKY goes, I don't plan on extending the range on her audio. The player is given a chunky 60 seconds the first time they are caught, and that time lessens with each capture. The point is to not get caught at all. The hide-and-seek mechanic in general was more of a courtesy to the player to keep the base game easy and the harder difficulties more streamlined in regards to their pacing.
So is your issue the range at which you can hear SUNKY, or being able to tell what floor she's on?
My goal with this game was not to make it a walk in the park for the player either. It is meant to be a challenge, as opposed to the puzzle and walking simulator horror games you usually see.