I'm onboard with your Gears 6 refresh ideas. I would like to also add more variety to a body being maimed in executions like when you bunch someone 10 times on the ground, there should be bruising and blood on their face. Sometimes a body crumbles into pieces after a curb stomp or whatever which doesn't make sense. I would also like to see more off the wall weapon variety like the digger and buzz saw.
Halo needs a refresh too. While they did some cool stuff with Infinite, it could have been much better with their open world design. Go back to a linear story with more big fights like we got with the scarabs in Halo 3. Have bosses like in Infinite. Time to bring back the flood with some truly horrifying moments. More vehicle and enemy types too. Also, fix the damn explosions. I hate the way phantoms explode in Halo Infinite. They just evaporate. Halo 3 and Reach had great explosions. Overall, gameplay is great in Infinite, but add more weapon variety and equipment.