When diving, that line cutting hook is very handy, especially in waters where scrap fishing line is present. I doubt that it significantly affects the strength of the knife. The biggest issue with all the dive knives I have used is that they are pretty poor knives, but I am not familiar with recent products.

My choice for a "sharpened pry bar" is a County Comm product, their EOC mini breaker bar (a larger version is also available), combined with any of several knives. I use the knife for cutting, and the breaker bar for bashing, prying, and other rough uses. Since my knife is usually a multi-tool, either a Wave or Blast, I have a very decent, but small, saw available for anything 2x4 size or smaller.