Not necessarily junior, and not necessarily better. But whatever,,, that's just whining since nothing was taken away from anyone. However now, vacation itself can be an impediment to exercise of seniority because a pilot may have to forgo bidding up so as to keep his vacation that his wife/hubby had planned for a year. There are other real assaults on seniority- Preferential bidding maybe number one! "Overall solution constraints" @Shrek - that is right out of the Hillary Clinton Benghazi play book " what does it matter now"?