Well the Fignon-LeMond turnaround can be attributed to Fignon having a boil and LeMond using a TT bike (arguably illegal) but unless we are told by the Roglic camp it may just be that it is easier to attack than defend.
Cycling Weekly regarded Aru as the "Star Rider" for UAE TEam Emirates but did say "Prodigy Pogacar was one to watch."
And I am glad for Porte.