Have you heard of that high elf? The guy you met back in Daggerfall, who spends his time locked inside his room grinding out his magic skills, then sleeps, then does it again until all of his skills reached level 100? You do that too in Bannerlord, because the old system is supposedly unimmersive and therefore bad. A lot of you who are into immersion disagreed with the old system. Why does hacking somebody's head suddenly makes you good at surgery, you ask? It's true, isn't it? Well, the TES leveling system only sounds good in theory, but in practice it's a total grindfest, especially your non-combat skills. There's a reason why only a few titles like TES still have that. Because it sucks.
Bannerlord doesn't have that problem you say? Try smithing. Actually, even the combat skills is a total chore to level up. Wouldn't assigning points to you and your companions pretty much make you too powerful as a player, once you know how the game works? Maybe, but your companions become more useful as they level up, because you can build them as you see fit. What's the use of companions now, if leveling them up is even more of a chore than leveling up yourself?
I know a lot of people will bash me for this, but really, falling into this TES 'immersive leveling system' meme is a sign that the developers would rather us build the character with some quick level up exploits, and by meticulously finding out what exactly makes each of your skill increases, rather than just building your character as you play them.