Yes, NFS Rivals requires significant processing power.
Yes, NFS Rivals requires significant processing power.
You're thinking about purchasing NFS Rivals. I've had the chance to play it, and it runs smoothly on Frostbite 3, similar to BF-4. It definitely feels like a powerful CPU experience. Let me know if you need more details!
You're not experiencing all those actions at once like in Battlefield 4, especially if your CPU is limited. That's perfectly okay.
Just because Battlefield 4 runs smoothly on CPUs compared to other titles doesn't make it a "CPU killer." I've spent many enjoyable hours playing it on my old i5-750. There are much better arcade racing games available for PC than NFS: Rivals. I highly recommend considering these options before choosing Rivals: http://pcgamingwiki.com/wiki/Need_for_Speed:_Rivals
This situation involves a video that clearly demonstrates the difference between media types. I'm surprised I need to challenge such a point in the PC Gaming forum—it's not like watching a film where feedback matters. Video games are interactive, and a 60 FPS is noticeably smoother than 30. Film footage with real cameras shows blur between shots, making frame rates less obvious. At either 30 or 60 FPS, the visuals look identical. Your confusion about this point isn't clear to me. It seems you're focused on the game's CPU usage but are okay with it being capped at 30? 
Physics can also be adjusted to 60 frames per second sampling to avoid speed distortion. Shortcut Additions -GameTime.MaxSimFps 60 -GameTime.ForceSimRate 60.0 Missing synchronization of these numbers leads to issues. You may choose 48/48 or 50/50 if maintaining a consistent 60fps isn't possible....for the smoothest experience, any rate at 33 FPS or higher provides a clear improvement over 30fps.