what can the crew do with slope data...
first off, the slope is part of the airline's calculations and I am sure they meet approval.
the real thing for me is the pilot's handling of the flare. you must create a mindset for a downsloping runway of flaring less...if you flare the normal amount the runway is going away from you and you float.
going uphill if you flare normally, you will get a harder landing as the runway is coming up to meet you.
(over simplified, but useful)
and yes, JEPPS don't show slope, but one can calculate difference between touchdown zone elevations for both sides of the same runway.
landing at binghamton new york really got my attention...fortunately I landed up hill the first time.
the first time I landed downhill there, I pretty much didn't flare and got on the brakes right away.
remember, it is not the landing calculation I am talking about...that must be ok or your airline would not be approved to use it.
BUT all calculations assume no prolonged float...so be careful.