Denoiser similar to RedGiant's Denoiser and motion blue like Reel Smart Motion Blur.
I am forever sending clips to After Effects to use third party plugins to get better results. Red Giant's denoiser just works. Most of the time I don't have to fiddle with settings. If used correctly it denoises the footage and you don't soften the image. At the moment Premiere doesn't seem to be that good at denoising footage. Also, nothing comes close to Reel Smart Motion Blur, if that was an option/plugin native to Premiere, then everything would be so much easier. Of course, I can still use the plugins, but would rather have it as an update in CC and it works as part of its own system.
Well, it could be a good idea to add the remove granules effect of After Effects into Premiere Pro (GPU accelerated ...).