If Baelor Breakspear had survived the tourney at Ashford, and with the caveat that he doesn’t die in the Great Spring Sickness, are further Blackfyre Rebellions forestalled or at least dealt with differently? Without Bloodraven as a de facto king, royal authority and protection can probably be asserted more effectively on the western coast, and Baelor was well-loved enough that social unrest would have been less intense (though probably still present to some extent during the famine).