Finally, I dont think Teferi, Time Raveler is problematic in terms of power level, but I want to see it go because of play patterns (or lack thereof) it creates
Then we have lands in Green with Exploration and Oracle of Mul Daya
Clifftop Lookout ramps us, and since Frogs draw so many cards, we need as much mana as possible to get them on the battlefield
All your modified creatures get trample, and dealing damage with a modified creature lets you thin your deck out a bit by searching for a basic land and putting it into play tapped
While Heroic Intervention might be too costly an upgrade for creature protection, all that is truly needed is to protect your Commander Bello
It makes it a decent cantrip by fixing the hand in the starting turns of the game, and later can be an enabler for combos in an Archlight Phoenix Jeskai deck or in an Esper Reanimator list