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They'd be strong but aimed at a very specific deck

Throwing in lifelink might make it enough for decks that care about life gain too, but I would accuse said decks of splitting their focus if they're also trying to win via aggro

Forcing an opponent to double block opens up a smorgasbord of different options for both players

So yeah, The First Doctor is going to be a cascade deck, and if you like Planechase cards, you can planeswalk too

The defending player can assign blockers normally even against tramplers

Its a novel way to play storm in EDH that doesnt leave you restricted to cards like Chatterstorm or Grapeshot