What if your liege is muslim and demands conversion? Why, your game is over because either option would end up with you being ruined, either by what is included in the screenshot or by your liege revoking your lands, imprisoning you and putting a muslim in your place.
Look at the defeat screen. It is the message that the player receives. Never before have I seen such a developer put into their game such a blatant message of "I'm taking my ball and going home." Never before have I seen a "No, you're not allowed to do that in MY game, you're getting a game over" screen from, at least what I thought was, an upstanding developer.
There is something fundamentally wrong with the message "You have become a Muslim and are therefore no longer allowed to play."
Currently there is also a bug that people with DLC can't play with those that don't own it. Intentional or not, people have bought the DLC just for MP lately. This is far too coincidental to be completely dismissed, just want to point this out. I'd certainly buy the DLC if I had to attend an MP session, just like many others have had to.
Something that also comes along with this patch is absolute muslim dominance. There are some quite significant differences in CB use. If you are muslim and have 500 piety, you can invade kingdoms which means you can obtain all titles under it. This is quite overpowered since 500 piety is easily attained by smaller holy wars for duchies. In 5 observant games I've run from 1066, Byzantium lost 4 times and the Fatimids had beaten HRE in wars. Iberia was just hopeless, muslims overran it every time by 1090~.
Something I noticed is that the army pathfinding is still plain bad, Byzantium and Seljuks lost more troops to attrition in the 1066 scenario than to one another. Sometimes troops just got stuck in a lapse of travelling between 2 provinces.
You cannot play Zoroastrian or anything but Christian anymore with the latest patch. Nor can you play Muslim unless you've got SoI.
No more Zoroastrians. No more Norse. All of which was possible by simple edits previously, if Paradox hadn't planned SoI, Pagan, ERE (?) expansions I'm sure that ambitious fan projects for these settings would have been started, possibly of superior quality since that is a running trend for paradox game modifications.
I don't see why this had to be taken out, apart from allowing Paradox to cash in for SoI.
I'm personally also disappointed with how Mali region looks. I think that the "All the Way to Timbuktu" mod made the region far more interesting, especially for those of us who hate ugly borders.
I love Paradox but you have to be critical of things you like.