The main one I can think of is to get more support helicopters down earlier. All but one of the Chinooks were lost on board Atlantic Conveyor, along with a number of Wessexes, and the remaining Wessexes arrived on board Atlantic Causeway a few days late along with more Sea Kings, with both ships carrying Harriers as well. However, Atlantic Causeway at least was also fitted with a Ski Jump, hangar, etc.
At the time she was hit, Atlantic Conveyor had already offloaded her Harriers, but still had the support helicopters on board. I don't see any reason why the decision couldn't be made to fly off the support helicopters ASAP to San Carlos (OK, they would have been vulnerable on the ground, but in retrospect less vulnerable than at sea where you risk losing the lot). Lack of helicopters pretty much defined the campaign - Goose Green was in large part fought because it was the only major Argentine garrison we could reach at the time, and all the yomping/tabbing cross-country through peat bogs was forced by the fact we couldn't fly the troops to where they wanted to go (same with the Welsh Guards at Bluff Cove).