Except that doesn't really fly with that 'previously-established concept', even back in Generation 1 you had pokemon like Jynx and Mr. Mime, that don't have anything to do with wild animals. Electabuzz, despite being based on Japanese ogres, also falls into that camp as well. That's not even covering pokemon that were living plants like the Bellsprout line, the oddish line, or Tangela. As well as the the non-animal-like Voltorb, Geodude, and Magnemite
Gen two had more of a lore base to the creatures - Sneasel is based on kamaitachi (sickle weasels), dunsparce being based on the tsuchinoko, Espeon based on the nekomata, etc, etc.
I could go through every gen, but even in Gen 1, we had already cracked that concept of pokemon being souped-up wild animals.
While I'm not too wild on the designs, people always complain about the designs whenever a new pokemon game comes out, regardless of the controversy this one has tailing it, it's happened before, and will continue to happen.
Personally, I like the concept and some of the designs of the fossil pokemon, although, personally, what I would've liked to see instead of the mix and match parts, I would've preferred a fusion like pokemon - Kinda like Digimon fusion:
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Then again, people were already complaining about how pokemon is now ripping off digimon.
As for anthromorphic starters...
*shrugs*
I don't really see that as a criticism, more of a subjective preference. Whether or not something is anthropomorphic shouldn't affect how a quality a design is. There's a difference between "I don't like this" and "This is bad design".
Like, I like Cinderance, but it has the opposite problem that Incineroar has - Way too small hands for it's arm type, like, give it hands like infernape, like gloved hands