I agree with you, man. I too thought that the game was great! Sure, the game has some issues that prevent it from being top notch. It's still great, though, but I thought that it could've been excellent. Off the top of my head, I can remember having performance issues on Xbox One earlier on before a few patches. The graphics could've been better. No replay chapter, at least I can't find it. The forced letterbox which was updated later to support fullscreen, but the HUD still stays in the same places. However, none of those really hampered the game for me. I definitely enjoyed it more than the recent RE games; 5, 6, and Revelations. It definitely felt more like that sequel to RE4 that I've always wanted. It's evident that there's so many similarities between the games. You play as a cop. Ruvik is betrayed by Jimenez, who's working with a secret unknown organization (Umbrella). During the final boss fight, you're given a rocket launcher. After beating the game, you unlock a machine gun and rocket launcher.
The story was pretty good imo even though I felt like it tried to come off as being a lot deeper than it really was. I really liked the way that the game was directed as well. The boss fights were pretty challenging, especially, since I went after all of the optional achievements associated with them. Difficulty wise it was pretty tough on survivor. I died 111 on my first playthrough. Plus, I felt like you needed to conserve ammo more so than in most other games. I pretty much wasted all of my ammo for my power weapons during the final part of the game.
As for talks of a sequel, I think there is going to be one. I'm not sure how much of the story you understood or looked into, but in the end, it seems like Ruvik has finally transferred his mind into a capable host, Leslie. Hence why he's still able to affect you even after you exist the hospital and why he's able to teleport and disappear. Also, as I partially mentioned earlier, you find out towards the end that he was betrayed, so I'm sure that he'd want to extract revenge. I'd certainly welcome a sequel, however, I wish they would take their time, do their due diligence and really polish the game next time around.