I have to be honest I feel like you don't really understand the problem with Halo right now, and what is happening behind the scenes that is spurring these decisions.
First I need to reference the God of War comparison, these are two very different games in very different places. Halo already had its "God of war 2018" moment when it released Halo 4, it was a gritty more personal ambitious Halo game, focusing more on characters, Master Chief and Cortana's relationship and bringing a stunning graphical showcase and a new art style, whilst also linearizing the campaign and gameplay. Although it sold amazing and received positive reviews, it was looked down upon by Halo fans and had a very poor post launch attach rate. Halo has a very strong identity and style that God of War doesn't have, the gameplay of god of war was nothing to write home about, it was inferior to most action games available at the time. The same cannot be said about Halo, no one wanted a lot of the functions that 343 brought with these games, no one wanted this new art style, no one wanted 343 to re-envision what Halo was.
The problem Halo has is more akin to what Star Wars was going through after the prequels, because people felt so strongly about that original core identity. People never felt that way about God of War, so it was in a position where it could get an ambitious out there reboot. This never resonated with Halo fans with the release of 4 (which did bring these things god of war did).
There's a reason Halo is going through its second "soft reboot" with infinite, because the core fans felt so negative towards these new changes that 343's games fundamentally missed what the games identity was all about. Sticking to the core principles and appealing to the fans that LOVED the game in the first place (and future fans who will also appreciate the game for the same reason the original fans did) is the key here. Look at what's happening with the Star Wars IP with the new TV shows, a strong focus on sticking to the fundamnetals, bringing the true feeling of "star wars", staying true to the style and the philosophy. This is how you win the OLD fans and the NEW fans, take a look at Mandalorian.