Gamebreaking cards that need to be banned:

Vivi Orniter
Voice of Victory
Elspeth, Storm Slayer
Tifa Lockhart
Kaito, Bane of Nightmares
Cavern of Souls
Mistrise Village
Snakeskin Veil (and all equivalents)
Overprotect
Agatha's Soul Cauldron
Omniscience
Kona, Rescue Beastie
Fear of Missing Out
Anticausal Vestige
Stormchaser's Talent
Traveling Chocobo
Fountainport
Bloodthirsty Conquerer
Cosmogrand Zenith
Stock Up
Consult the Star Charts
Ouroboroid
Bristly Bill, Spine Sower
Mossborn Hydra
Sunspine Lynx
Screaming Nemesis
and so on.

Strength of Creatures needs to be brought down to pre-2005 levels in order to match the comparatively weak interation. If you're worried about the typical UW control deck just sitting there doing nothing, just stop printing white board wipes.

Moreover, the release schedule needs to be slowed down to once every four months to enable more thorough and competitive playtesting (not just testing the set in casual commander), and, to ensure that the game is actually balanced and not yet another mess of one deck becoming 40% of the format or two decks becoming 80% of the format. I.e. what happened prior to rotation resulting in the hearthfire hero and cori steel cutter bans and what is currently happening with the Vivi Cauldron deck.

In addition, standard needs to be brought back down to two "blocks" rather than three. A smaller cardpool can allow for a much better much more fun game rather than a monotous jank midrange and three turn aggro solitaire decks which is what defines the current standard.