What happens if, in Wrath of the Righteous, a character dies after you've started adventure deck 2? Is the character actually supposed to start from scratch, with no feats and no mythic paths? That doesn't really seem viable. The Wardstone Fragment doesn't necessarily help, if, for example, the dead character has it in his deck. If you're really supposed to go on like this, the game will probably become unbeatable in the long run. So, that can't be right, can it?
The path and role aren't addressed by RAW; it only mentions feat and card rules. The exception is OP, because those are tied to the Tier System, and rerolling is covered by it.
If you're just playing casually, I suggest rerolling with a default deck (AD-2, with 0 = basics) and feats / path / role as appropriate. With regard to the Knights of Kenabres boon (end-AD2: five skill feats,) you get what the party got. This simulates the process of working a new character through the AP up to the respawn point, which saves days to weeks of time in exchange for a weaker card profile.
The tradeoff for that time savings is that you don't get better cards (whether lucky finds or Loot cards) in this manner.