Gotta agree the original mythos is way cooler and more interesting and opens to deeper themes like the darkest side of humanity.
But how much a creator will dig will depend on how much focus and relevance said creature will have in the story. If it is just a "monster of the week", they may not dig that much.
Of course, if they research, said monster could be more memorable.......
One could argue that any vampire story is to some degree an appropiation of easthern european culture. That mindset would limit a lot on the creation of fiction.
Even in older examples are many different portrayals. Nosferatu and Dracula are completely different.
Also we have modern examples, like Twilight, in which vampires are not killed with the sun.....they......sparkle.
And while i thought it was silly and cheesy, i believe in the freedom of the different portrayals of creatures. (even if i dislike that specific example)
Some older portrayals may be considered clicheed, some modern ones may be weird or even silly, but it depends on it's excecution and on what fits in the story what will be the best approach and how much one sticks to the original mythos.
Different genres will take different approaches, for example, Horror, Romance and Comedy will prioritize different things.