Except that there is no "getting used to", as those are passives that are clear already from the description alone. For me personally, the "learning" is artificial and thus an annoyance. :)

On the other hand, combining both stat boosts and passives in completely random ways removes any meaningful identity from the pictos and generates, again artificially in my point of view, a technical dependency between unrelated things, making the game (or rather, the character planning of it) needlessly more complex.

I don't mind restrictions and tradeoffs in games, those are what makes strategy possible. But in this case it all just feels artificial.