Campbell
Relaxed Intensity
I don't see where mechanics are being placed above flavor in the monsters described above. The flavor of those monsters might not be to a lot of people's tastes, but I don't think that has anything to do with these monsters being designed for a mechanical niche. The issue I see with a lot of these creatures, and this applies to most of the new monsters detailed in the MM, is that they are more reminiscent of Weird Tales monstrosities than a creature one might expect to encounter in mythology. Of course this isn't a problem for me, but I could see where other people might take issue with these newer monsters.