Gavia would just get cancelled even if there was no avalanche risk. Teams have gotten very soft and can get the stage altered at any point. Cold temperatures are enough to get a stage nerfed.
This year the Giro had the softest route on paper after the cancellations, with zero >4000m+ stages (the two hardest stages were >3900m, though), while the Tour had three 4500m+ stages and another one at almost 4400m.
Vuelta was similar with two 4700m+ stages, a 4400m+ stage and one at around 4200m. IIRC
I use the Denivel+ stats over at LaFlammeRouge
I think RCS made the right call this time (given how soft the teams have gotten), although their claim that the queen stage is 5800m+ is ludicrous. LFR has it at 5200-ish.
Even if the Fedaia stage gets partially cancelled there are two other stages that feature more climbing. The Blockhaus stage comes in at 4900m+(!) to my surprise:
Route of Giro d'Italia tracked with La Flamme Rouge editor. Isernia > Blockhaus: 191.61 Km - High mountain
www.la-flamme-rouge.eu