Learning how to accept getting bored will be key during the Giro as he could win 10 stages if he raced like he was in PCM.Agreed, especially on Catalunya. His risks of losing reserves in this quest are up to him. He hopefully knows when to check out of a race and rest up. The psychological focus and added press attention is always another set of demands and how he handles setbacks. They'll come and the Giro seems like the most likely venue for that. Like Peyro said, it can be cold and wet...and taxing.
It would be wise to smash the first week and build a big lead that then sets up the rest to fight among each other for the podium as then the other teams will police breaks and spare UAE a lot of the donkey work controlling the race thus keeping key domestique fresher for the Tour and the double attempt where he will need the full strength of his lieutenants.