I’ve heard this many times, but I still don’t see the need for “training”.

I played the game at a leisurely pace and all the training that I needed took place as I explored my way through the world. Levels were gained, levels were lost. I never felt that I needed to babysit my leveling.

I suppose if you are strapped for time and want to just take on the bosses as quickly as possible then training might make sense for those select players. But my feeling is that is a minority set of players and I doubt that the devs will build specific game functions to support it.