Honestly, when I think of Punishing Fire in the context of current Modern, it's either laughable (against Primeval Titan, control, Crashing Footfalls, 3/3 Dragon's Rage Channeler, reanimated Archon of Cruelty, etc.) or potentially even a positive, as a repeatable answer for the repeatable cheap threats from various Lurrus of the Dream-Den decks
Not only that but his secondary ability discounts the Blitz cost of a card for each time hes been played from the Command Zone
Can I Have Four Planeswalkers in My Commander Deck
Four Knocks Hey, its a personal Howling Mine
For this upgrade project, we took only cards found in the starter deck and the other Rise of the Floodborn products we got on release day (for a full rundown of what we opened, see our Rise of the Floodborn review)