That's actually not true. In MoM you CAN develop your character further. High level Mana Nodes yield special rewards, which could include spell books of colors you didn't have before or some of the traits you choose at the beginning.
you guys really cant read
i didnt say you cant develop
i said you DONT HAVE CHOICES (
)there aren't options for developement
ofc you can progress your king in mom, what you cannot do is decide anything
so even if you happen to find rare books you just take them and go ahead with what you are given