ShadowAngel.207: Well, no. It was still Resident Evil: The characters were the same, the basic story about Umbrella was the same. What did change was mostly all the flaws that made the previous games for me really bad (horrible controls, horrible camera angles, boring slow zombies and jump scares you could detect 2 minutes before they happen) and making it a lot more action but it even retained some of the old gameplay mechanics, like the mixing of herbs. So it is Resident Evil.
No it isn't.
The story handwaves umbrella's demise at the very beginning and tells a different (rebooted) story. The first minute goes like this: the big bad of previous games was defeated, I'm not going to tell you how or give any other kind of closure to that story, but worry not because here's a completely new story! It's about Leon. Remember Leon, from RE2? He was cool right? Well, here's the guy again, except he changed from a rookie cop to a super badass special agent and has basically nothing to do with the old Leon, but the name's the same so it's fine.
All the mechanics from previous games disappeared: you're showered in ammo, need to buy/upgrade guns, you have no specific map to explore, no puzzles... And put QTEs instead of jumpscares, over the top action secuences instead of a feeling of tension, and a lot of explosions because they're nice to watch. Keeping health potions as "herbs" instead of calling them "medpacks" does not a Resident Evil make.
Mind you, I enjoyed RE4 a lot. It was a great game. But it was hardly a resident evil no matter how you look at it. Why not call it something else? You had generic villain cult leader as the bad guy, generic special agent as good guy, generic useless girl as the princess, entirely new "zombie" type as main enemy and only Ada (&Wesker) as background to somehow link it to the old series. There's nothing there that benefitted from it being part of the series other than marketing.
Again, if you decide that mechanics are outdated and you can't make that kind of game anymore, that's fine. Make a new kind of game, and start a new franchise. Don't entirely change an established one.