Pick any example you wish, then put the reconstructions in sequence by date, and you will see that they changed over time not due to "artistic license", but rather to improved understandings:
Boogieman: "We simply don’t have that capability with extinct organisms, so there is an automatic deficiency to the technique when applied for this purpose, that can only be compensated for by increasing the amount of license that goes into the reconstruction."
So, your basic problem is that you've mis-defined and are misusing the term "artistic license":
- "Artistic license (also known as dramatic license, historical license, poetic license, narrative license, licentia poetica, or simply license) is a colloquial term, sometimes euphemism, used to denote the distortion of fact, alteration of the conventions of grammar or language, or rewording of pre-existing text made by an artist in the name of art."
The fact is: nothing remotely resembling such "artistic license" has ever gone into these reconstructions, even the ones which later proved to be greatly mistaken.