That's a tough question i'm asking myself the same thing seeing the steam sales... I haven't played KoA but R.A Salvatore is one of the writers and nobody writes fantasy combat quite as well as he can.
That being said I think the only reason there is so much criticism for RE games is because its such an
epic series like Final Fantasy. Everyone has their own ideas on the way the gameplay should evolve because they are so invested in the franchise. All of them are worth buying and playing because the production value is so high. There's a reason we have to wait so long between titles, it's not just the same game remixed with a new number.
Saw this episode of Co-optitude the other day of RE-4. It's the creator/producer of the web series "The guild" Felicia Day and her brother doing a web series where they pick random games to play together. Both of them are hilarious and shows off the game a bit, even if they suck at playing it.
https://www.youtube.com/watch?v=g0dvSPQYrhw
edit: I don't know how to embed YT links apparently XD