These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Adaptation Displacement - A "derivative work becomes successful enough to overshadow the original work completely" is especially true here. Hardly anyone knows of Dean Koontz's Intensity, and if they do, they probably know of the book but not the 2-part miniseries. It's why this has its own TV Tropes page, and Intensity doesn't. It's why this is available on Netflix and Blockbuster, and Intensity isn't. It's why this is available on Blu-Ray and DVD, and you can only find illegally burned copies of Intensity, or on Youtube before it gets deleted due to copyright violations.
In short, if you combine Laura and Ariel then call her Alex, and then combine Chyna and Edgler and call her/them Marie, and take away all character development, you can pretty much guess what's going to happen from plot point to plot point.