Getting more in-depth into the issues with the class system, at first glance its designed so that any unit can go into any class and for the most part, they’ll preform their role in that class well. Adding to this, every unit has a different set of spell lists, combat arts and different innate talents in certain abilities, and weaknesses in others. A select few characters also possess hidden talents which when maxed while turn that ability from a neutrality into a talent, in addition to unlocking a skill related to that talent. On paper this sounds like a highly customizable system, but in practice it fails to encourage this customization. Despite the many class options most of them do not gave much to set them apart besides the mastery skill they grant once you master said class, and even those suck outside of a select few. It leads to a system where you get given a wide range of options, with a select fee of them being the implicit “correct” option. For instance Lysithea despite having a hidden talent in swords is geared exclusively toward the fully magic oriented class tree of Warlock > Gremory. It isnt helped that many of the class choices for certain weapon specializations are bad, leading to strange combinations. For instance any units that prefer to use swords do not have any master class options that help buff their sword usage outside of the magic focused mortal savant class, and have to rely on the inferior swordmaster advanced class. The biggest obstacle in class customization being gender locking. Certain classes are flat out unobtainable if the character is a guy or a girl, and some of the genderlocked choices happen to be the best for certain unit types. Gremory is by far the best magic type class, yet is accessible to women only, leaving any male magic oriented characters with no option except the vastly inferior mortal savant or dark/holy knight. meanwhile the best physical combat class, War Master, is male exclusive, despite there being a large portion of female characters that are heavily oriented toward being a war master, and have to contend with being stuck in warrior or becoming a Wyvern Lord. In the end, the experience becomes less like you are customizing characters and more like you are customizing classes.You could try to attempt to make some of the niche choices work but they will preform far far worse and will require far more resources to make them into those niche choices. In the end, most people playing the game, be they casual or Veteran, will end up slotting the same characters into the same classes, rather than having a variety of them.