The artwork on the ''Mythos of...'' cards is really cool; I dig the nod to prehistoric cave art.
However, over all, I am really disappointed in this set. There are a lot of incongruities for me, and I too feel as if this set largely consists of ideas thrown together in the hopes something sticks. This set also seems geared towards a younger crowd; the legendary creature names/convoluted creature sub-types are a bit silly and the mutate mechanic is really clunky. Some of the artwork is downright horrible; Otrimi, the Ever-Playful has not only ridiculous artwork, but the entire concept is nonsensical. Yidaro, Wandering Monster is another card that is incoherent; a
giant turtle with haste?
The keyword counters doesn't seem necessary, but the return of cycling is nice.
I remember people complaining about dinosaurs in Ixalan turning out like the samurai of Kamigawa and their inclusion in Ikoria seems a bit forced.
WotC announced 2020 as the year of Commander and the RC already banned Lutri, the Spellchaser because that card is clearly problematic. You can say that it was created to add more depth to standard all you want, but you cannot turn a blind eye to the impact it will have on the most popular format today that nonchalantly.
It seems to me that the mutate mechanic is a clumsy variant of the augment mechanic from Unstable. In fact, I feel as if this set was a way to use extra Un-ideas. Ikoria should have been called Uninspired.