Honestly, the length is part of the reason why I gave it a 9.5 (I didn't think it would be that contentious so unfortunately, I didn't really talk about it in my review). Part of what I love about the original RE2 is how concise and lean it is.
Other than that, I think it's easily one of the best RE games ever (and maybe my favorite). It feels like a nearly perfect modern interpretation of classic RE but with an OTS perspective. Also, I really loved what they did will all the characters, especially how they expanded the side characters, but Leon and Ada were absolutely the best part. Plus little things like the way the map works now are a really nice touch.