By being a straight-to-Modern release, it didnt provide an easy on-ramp for those new fans into the games most popular rotating format, Standard
The new design featured the Magic font Beleren, a reduced background size and shape, revamped collector info, a full width token name and a smaller border size
But yeah, Doctor #4 has a once-per-turn effect that lets you play historic cards (that's to say, legendary cards, artifacts, and sagas) from the top
I really like that each one is quite different, and would definitely take your build in different directions depending on which is leading the deck
Commander cards never got to shine in drafts, standard or modern and so they typically sit under people's radar
Ramp Key to any deck is consistency, and with tons of expensive cards spanning three colors, a solid core of ramp is required