Hi! I wrote a post about a month ago addressing this very thing at length
. The tl;dr version is that under the current RC and given the current dynamic of slow(ish) multiplayer for which the format was intended, the cards you mention aren't going anywhere. MoM seems like a borderline case but since it's 2UUUU it certainly doesn't go in enough decks to be both ubiquitous AND degenerate.
And yes, fast mana IS that scary. I like my EDH games to go past turn 2, thanks, and Artifact Decks do just fine without Academy.
Animar: All-Creatures, All The Time (Silly stompy-aggro)
Sen Triplets: Robots! (Proliferate Control/Combo)
Sedris, the Traitor King: BRAAAAAINS (Zombie Tribal)
Zedruu, Group Pickpocket (Pillowfort Test of Endurance deck. You heard right)
Ghave, Guru of Dumb (Token Control)
As for blue- being boring/infuriating by crushing everyone else's fun until it assembles a cheeseball combo is pretty much what it DOES.