I did opposite with Muscovy, that was my first religious group change.Take everything you know about a chill, peaceful, Castile game, and throw it out the window.
The only limitation is that you have to do this while you still have a Christian majority i. Heck, get humanist ideas and you won't even lose any religious unity for having heathens in your nation. The ottomans really don't have to convert their provinces as their first national idea gives them extremely high tolerance. Mechanically, the Sunni religion is extremely good, so you aren't losing much in that regard. The benefits are mostly that Christians won't hate you so much and you'll be able to ally them more easily.
How do you as the Ottomans convert from Sunni to Orthodox and what would the benefits for doing this be? It's hard for me to see if there are any benefits, as it would be hard to have to convert every single province you would take when expanding eastwards. Home Discussions Workshop Market Broadcasts.