No, but you could, for example, allocate the holidays equally amongst the team, or as a special class of days with a different schedule like weekends.. rather t

No, but you could, for example, allocate the holidays equally amongst the team, or as a special class of days with a different schedule like weekends.. rather than just screwing whoever happens to be on that week? The fact that the product seems to have no concept of holidays when its essentially a scheduler++ is a problem. The problem with doing trades which is the default easiest thing to do given the PagerDuty interface is that when you come back from (or just before you go on) vacation you typically end up with extra bonus on-call shift outside the cycle. Delightful! All these things just sort of pile up into the "maybe its just easier not to take a couple days off" category, which is not really a mistake on your employers part.