Expedition: general discussions.

So, I am in favor of its modernization, including simplifying it, although I also find it difficult to imagine how to balance it.

Simplifying the system should not lead to complicating the balancing, otherwise it is no longer a simplification.

Well, Ples, a system with a bunch of different points, each of which is needed to upgrade something specific, also seems unnecessarily cumbersome and not very interesting to me.

2-3 groups of points, and everything should be crystal clear. This is much easier and more elegant than "here are general points for everything." In addition, a system with separate points encourages a certain kind of versatility of characters, while a system with general points encourages even greater specialization than is usually present in expansions.

And in other systems, how does a rogue level up? Unless you add something from magic. Otherwise, it's all the same.

Magic would also be useful. And in other systems, rogues don't have this problem because assassination is usually just one skill out of a group. And this skill does not limit the acquisition of other abilities. In your case, this is not one of many skills available to everyone, but the only path for a character who has chosen the class. That is, rogues do not get any diversity.

Class restrictions are generally normal.

Normal, but when there is some diversity and there are self-sufficient branches. Here, rogues are deprived of diversity, and scholars are deprived of self-sufficiency.

Peaceful skills are good, it's just that many want to dominate and don't take them, that's the whole problem.

Peaceful skills in expansions are useful, at most, once or twice per game. And that is why they are not taken, Aretz. Some combat skills, such as leadership (and sometimes assault), also suffer from this kind of problem.