With the release of the (play-test versions of the) Ninja, samurai, and Gunfighter, what sort of in-game justification, if any, would you require for a PC to re-train (in essence) from Rogue to Ninja, retroactively.
You can't multi-class Rogue\Ninja or Cavalier\Samurai for instance, but if the new sub-class was kinda what the PC was trying to accomplish from the get-go, how far would you force hem to go in-story to justify what would be a pretty radical rebuilding?
Its admittedly setting-dependent to a HUGE degree, but would, for example, having adventured with a pair of Monks for a long time be sufficient for a Rogue to sort of go through a retraining montage and emerge a Ninja? they're not that far apart (as opposed to Fighter\ Gunfighter, for instance that are WORLDS apart).
I would hope that Ultimate Combat would give some guidelines\pseudo-crunchies to accommodate those kinds of transitions, but I'm curious as to how the community feels?