I've had more fun with Civ 6: GS than with any other Civ game, two times had to restart two Emperor games when I had neglected the military and got declared joint-war. I've seen actual fleets and AI joining emergencies with big forces and even succeeding. Yeah the tactical combat is Civ 5 level = not good, but I'm still having fun. They have done improvements like now AI can move and shoot on same turn (unlike Civ 5) but sometimes AI attacks with obsolete troops, probably has to do with strategic resources. (For higher levels I would recommend giving them free strategic resources so they can have up to date troops) Every patch has had constant improvements for combat AI but it's not easy to create a great AI, it's not about Firaxis being greedy or lazy. Paradox games like EU4 and HOI4 have a bad AI that gets huge bonuses like no upkeep for forts in EU4, and those games dont even have amazing graphics that Civ games have.