I don't think that your general idea is wrong. However I disagree woth some of your examples.
I find it strange that every character get the same opinion boost from minor titles which is unlike giving gifts in which greedy characters get happier than normal while charitable don't care much. I feel the same should apply for minor titles like proud characters would maybe get happier than usually while cynical characters maybe should not care much.
Charitable should totally care about minor titles. Titles are the big deal. A greedy person will only see the associated benefits for themselves. A charitable person can see it as an acknoledgment of the good things they did for the kingdom. Or as a mean to do even more good. Charitable people don't refuse wealth and titles - you're thinking of ermits and ascetics. Now of course it could depend on which minor title you're giving away.
Similarly, it seems that "cynical" will be renamed in CK3, but behind that name, it's essentially a non-believer (or "utilitarian" if we're going to use philosophical schools) trait in game. And even if we're going with a broader definition, cynicism isn't complete relativism. Cynical characters may think things such as "yeah sure to going to the church today will lead me directly in hell, too bad" or "I'm only giving the Church money so I can ask for a divorce" etc. But minor titles? They are a minor source of money and power. Why would a cynical character disdain them? They may be aware that their liege is only giving them so they have a better opinion of them. But it might just work, because minor titles aren't meaningless. Better than nothing. And certainly better than words or prayers.
Now of course if we had thinkers of the greek school of cynicism in the game they wouldn't care about titles or anything, but I think that point has already been discussed a lot. Those philosophers aren't in the game.
I think we must keep in mind that the characters we play are still mostly nobles and rulers. Some are greedier than others, but all of them are very interested in land and titles. And let's be honest, it's also true for the religious people and the few commoners in the game.
But as I said, it would be nice if traits had influence on this kind of thing if it isn't already the case.