Gibraltar and Madeira have better options for a deviation. Airlines flying to St. Helena are in a more difficult situation. Either risk a landing and hope for the best or safely deviate to Ascension Island not knowing what to do next with passengers and the aircraft. I can imagine Comair is not very keen to operate that route
Agreed but then again it's down to probabilities. All flights carry a commercial risk of diversion - you just need to consider that risk in the planning.
In the 1970s I recall operating to Bermuda in the B707 for which we only carried island reserve of 2.5 hours (no diversion) and Bermuda was renowned for crosswinds as the runway was 90 degrees to the prevailing winds. On occasions one might hold or go around and then hold for another attempt but we always managed to arrive there safely. And the B707 was far more challenging in cross winds and wind shear than any of the modern types of today.