A few of the games mentioned don't really need simplification. I've been playing Carcassonne with my daughter since she was 3 years old. She can't do the scoring but she understands all the rules and how to earn points. The only thing we simplified originally was just not using Farmers.
We recently got a game called Outfoxed! which says it's for 5+, she picked it up after the first round. The hardest concept for her was moving diagonally and that you aren't allowed to in the game. It's a great game for learning to read names since all of the Foxes have unique and not trivial names to pronounce.
Yes my youngest loves carcassone, we played. He’s 5 now and we also play ttr (first journey and London), catan junior, and he is a big fan of Station Master, which is an odd little game we picked up pre kids. We went through a phase with outfoxed And guess who, but he preferred the rest now.
We recently got a game called Outfoxed! which says it's for 5+, she picked it up after the first round. The hardest concept for her was moving diagonally and that you aren't allowed to in the game. It's a great game for learning to read names since all of the Foxes have unique and not trivial names to pronounce.