A button to boost morale authority does nothing to make a religion less boring (in fact I'd say it's even more boring). As a jewish ruler, your holy war casus belli is valid against the entire world, for +3% each time. Restoring Israel is easy even at ridiculously low morale authority (which mechanically is a compensation for conquering lots of provinces. Isolated religions should have low morale authority).
In regard to province conversion, it's normal that the Israelite religion group had a hard time to convert provinces because historically it did. It was never a proselytic religion unlike Christianity and Islam. However, they actually should have a monastic order (the Nazirites) after building the Third Temple. A Nazirite is a jewish ascetic who abstains from alcohol, grapes, and cutting their hair. In the middle age, this lifestyle was disapproved and some of its ritual obligations couldn't be fulfilled since they required the Temple, but it fits the scope of a CK2 society. A current alternative is to adopt an heresy, secretly convert to the parent religion and use a secret religious cult to convert your provinces. Gamey, but less boring than clicking a button once per year.
It might not do anything to make Judaism less boring, but it'd at least be something. Anyone can get high MA by the method you describe, but if you're roleplaying as opposed to powergaming, you won't be mindlessly declaring holy wars at every opportunity you get. Sometimes, I just don't want to expand to a certain area or or ruin my clean borders.
I disagree - isolated religions should NOT necessarily have low moral authority. There are many historical examples of religions which have survived and thrived far from their "holy land." If we're using the logic Judaism does, then all of Christianity's biggest holy sites should be places of biblical significance in the Levant. They're understandably not, because there are plenty of holy christian places outside of the Middle East. But by the same logic, look at Russian Orthodoxy; it didn't devolve into random heresies or revert to paganism after the Byzantines were gone. Buddhism had great success far from India long after it had already been supplanted in its place of origin. Manichaeism, too, even found converts many miles from Persia.
The whole concept of moral authority is kinda broken. I get what you're saying about the religion's non-proselytizing nature, but this is already reflected in the Jewish AI's unwillingness to select the "convert province" mission. Ironically, I've already done what you mentioned in regards to secret conversion; I did it with pre-reformable Bon paganism, too. It's gamey as hell and not really satisfying for that reason. I just wish there was a way to reliably,
legitimately convert provinces.
On that note, I can definitely get behind a Jewish monastic society. Honestly, if all religions had one, I wouldn't raise any objections about the current moral authority system; the ability to build at least a few coreligionist provinces would be enough for me.
