EU4 missed the lowest hanging fruit

In EU4, there are 2 religions that nations can switch to via missions: Persia reverting to Zoroastranism, and nordic nations to the old Norse tradition. I'm not arguing a removal of these possibilities, as they can be very fun, but they just don't make sense. Persia was conquered by the Muslim Arabs and subsequently converted, with most of the population (barring small pockets) but the 10th century. Around the same time, Christianity was on the rise in Scandinavia, and was first cemented among the common people, then among the nobles. Either way, Zoroastrianism in Persia by 1444 had been reduced to isolated communities, and the Norse rite was gone, possibly with the exception of a handful of people in Iceland. But if these religions get a path to revival, we have to adress the elephant in the room: Lithuania.

The Grand Duchy Converted to Catholisism in 1387, but in name only. While there were Christianization efforts, these were oftentimes nominal. In fact, lots of Western Lithuania remained openly pagan, while most of the rest of the Lithuanian heartland was Christian, only on paper. One of the deciding reasons for the Lithuanian conversion, was a union with Poland, which in other words was a conversion motivated by realist diplomacy. Given all this, if Poland decides not to go with the union, Lithuania could have the option via missions to go back to its Pagan ways (Samogitia region should also be Romuva at the start).

Honorable mention: Hordes to Tengrism (Islam was the religion of most states on the Eurasian steppe, but it was syncretic. Although not as realistic, it would make for good larping).

What do you think?