From a Standard-legal set, it's hard to place a card into Modern on raw rate.
Usually, the cards that do something to the format are there because they hit close on rate but add some new, unique angle. They create a fundamental shift in the format.
From the early Magic Online Modern results, Throne of Eldraine has a lot of those cards.
- 4 Arcbound Ravager
- 2 Etched Champion
- 2 Gingerbrute
- 3 Memnite
- 4 Ornithopter
- 4 Signal Pest
- 4 Steel Overseer
- 4 Vault Skirge
The fundamental shift is All That Glitters. It's been a while since I was playing with Steelshaper's Gift as an extra couple of copies of Cranial Plating, but this one costs two mana. Not the full four to find and equip that Steelshaper's Gift did. Not even the three mana a Cranial Plating costs. Just two, and unlike Master of Etherium, all of the counting damage has "haste."
That lets your Affinity deck go back to the hyper-aggressive starts the deck was optimized for prior to Experimental Frenzy. Hands where you stack multiple All That Glitters and Cranial Plating effects can easily deal lethal actual damage by Turn 3, where previously most of your Turn 3 kills were Inkmoth Nexus. The removal of Faithless Looting has left people kinda unprepared for that speed, and while Modern Horizons brought a ton of messed-up tools to deal with artifact decks, those cards require Affinity to be seen as a target before people show up with them. The new Paradoxical Outcome decks being largely immune to Collector Ouphe and Stony Silence is a huge upside, sreaking as someone who once went twelve wins and Stony Silence losses at a Grand Prix with this deck.
This won't be the last we see of All That Glitters, but it's a good lesson that redundancy can sometimes be the fundamental shift.