Well, being 3-colored is a pretty high price at least.
There have been a few cards with slightly pushed stats before, but I feel like, it really started when they printed the titans. I think power creep can be a good thing, to some degree when it makes sense. Like, creatures really were too weak 15-20 years ago. But there was more of a fundamental change. A change in philosophy. Rares were better than uncommon and commons, because they had interesting abilities and/or rewarded you for building correctly. They weren't just good because their stats were pushed in absurd ways like we see here.
Rhox was clearly better than
Giant Warthog, even though they had the same body. Rares used to be more complex.
For example, noone would say
Dark Confidant is a weaker card than Ilharg or the new Kefnet, but Bob doesn't have that too good feeling to it. It just has an effect that happens to be great in low curved decks. it is not good because they wanted to push it and made it a 3/2 with deathtouch and indestructible.
These days, Maro justifies pushed creatures with "Look, it's (mythic) rare!", but to me it also feels like they're violating the color pie more and more. Blue was the best spell color and the worst creature color since the beginning of MtG. It feels wrong to me to give it a goddamn (no pun intended) 4/5 flier for 4 alone, but then in addition it has also two strong upsides. Sure, it will see standard play at least probably, but I get the impression, they just push cards unreasonably when they wanna force players to use them i constructed, while cards like that one completely destroy any fair limited game they get played in. The same can be said for the Boar God too, a 6/6 tramper with two absurd upsides is nothing red (the second weakest creature color) should get. It also doesn't need to, because even stuff like
Ironclaw Orcs saw constructed play in the right meta. That shows me, that the creature push is far beyond the necessary at this point.