I was thinking of Almudjadids in Picardie, Brittany in Norway, the Bohemian mess and the über-Hansa, for example. It's not too surprising in a game, but historically, it makes no sense at all. I'm an alternate history guy, so I like when it makes sense.
It's alternate, but still realistic. The Moroccans conquering northern France is just bizarre.
Fair enough, those are certainly non-standard outcomes, but nothing unusual interms of the EU2 game. Pick any mod or vanilla and run it for 200 years and the map is going to have some wacky things. This wasn't a built scenario, just a savegame, so it reflects all those inevitable oddities. But the scenario isn't really about Gaul, just a chance to play the Kowalski-era Poland, which will normally limit itself to Germany/Bohemia/Hungary/Halych/Tuetons. Yes, the Hansa have done very well.
Feel free to run the game hands-off and save it immediately after Poland reemerges (likely in 1593). Although, you might need to start the game playing as Poland and deliberately screw it up to ensure it disappears ...