What should a zombie be? There are a bunch of cultures with a bunch of takes/myths on the matter, a bunch of films, not many books like we might have for vampires. Also from the start the series seems to have been about science run wild than the animated corpses of your loved ones returning from the grave.
Well again, the original and most accepted version of zombie is the one like in first to third RE series, and those like walking dead series and the like. Yes, science runs wild that create zombies as a result. But then starting from 4 to 6, it's no longer creating a zombie, but instead, a parasitic creature that takes over the human body. I saw a clip of the RE 5 game, where they turn a human into those parasitic being by inserting the parasite seed inside their mouth. Again, that's no longer a zombie.
As for wesker, nemesis, and the likes, they are bosses. A one of the kind zombie. It's fine adding some exceptional zombie like that, since every games need bosses. But when even an ordinary zombies are like that, that's kind of weird. In RE 4, most of the zombies is capable of wielding weapons, like axe, torch fire, or even chainsaw. If they keep making it like that, it would not be impossible that in the future, all ordinary zombies are wielding swords, guns, bazooka, or other weapons. They might even create a special forces like CIA whose members are all zombies (or parasitic beings in this matter, since i don't think they can be called a zombie anymore).
Yes, the game has changed their universe from zombie game to another being, and that's what i criticized. I don't know what's the main idea when the creator make this game. Is it about survival in zombie world, or survival againts biological weapons. As for me, when i first play this game, i saw this game as a survival in zombie world, so when they start changing the enemy from zombie to another being, it just feel not quite right for me. For comparison, consider yourself love Jurassic Park film. And then, they start manipulating the dinosaur gene, and create a dinosaur that can walk like a human, can talk, and even use weapons. It would ruins the whole image of the movie, isn't it? And in my opinion, that's the same thing that happens with RE.
I don't know which version most RE player prefers, but for me, I simply hoping to see the game revert back to their original zombie game. People can say that if I can't adapt to the way RE games are right now, then i can simply go and play another zombie survival game. I understand that. In fact, that's what really happens. I only play the beginning chapter of RE 5, and don't even bothered to touch RE 6. I would still do if they still decided to keep the current game universe. So, when i heard that RE 7 would go back to how it used to be, i really hope that it would revert to how it used to be in RE 1-3. I don't mind if there's a lot of people who doesn't agree with me. After all, I'm not gonna forcing my ideals to others. I simply stating how i feel about this series.