Adrenaline, Hope and the hatch
Dead by Daylight is an asymmetrical game, in which the power of the killer on average equals that of the entire team of survivors, but, over time, the latter is reduced and, in the final one vs one, the killer expresses their maximum potential and the survivor can only rely on stealth and a good deal of luck. In order for the showdown to constitute a real challenge for both, I suggest that Adrenaline and Hope also apply to the last survivor, when the hatch opens. Currently, however, there is no challenge for the killer: the penultimate survivor, left on the ground to prevent the last to escape from the hatch, must have an opportunity to save themselves, when the killer finds and sacrifices the other: hope for them, desire for a blind revenge for the killer, an intense, breathtaking, not trivial ending, for both. 
Comments
Well, i had several game where i was slugged and crawled to the hatch and escaped.
sometimes i found the hatch by accident, sometimes i knew where it were.
So you still can escape. For your idea to be challanging, the hatch-standoff needs to be solved, because else there would be no challange to the survivor, and your proposal was to be a challange for both.