Hi Chris. I like the shots. The details in the running water seem a bit lost and you say that you have a problem with sharpness. IMO what you need is some 'structure'. I added some structure to the second image with Viveza (globally and also selectively to the water) and then I applied a softlight blending mode with %65 opacity in PS for the below edit. We sometimes make quick edits for other members' images in order to help but if you don't like it please tell me, I will remove it immediately.
PS. I agree with the others that a faster shutter speed would bring out some detail in the water.