I accept it is a bit crude, Robert, and it isn't much value if the images need significant noise reduction.
But resizing down to <1/3 size is typically for web usage, and at this size the capture sharpening has less visual effect on the final image than the output sharpening. That's pretty obvious when you compare the unsharpened and 1:1 export versions.
If you need web output in any quantity, I'm not sure you have many better alternatives. Export from LR5 at full size and resize in LR4, via Image Processor in Bridge (with an action to apply sharpening), save that sharpening action as a droplet and run it as a post processing step in LR5 (bottom of export dialog), or use some other app?