It seems unlikely that Wizards would be interested in revisiting such a controversial mechanic to print more companions in future, but that doesnt mean we need to give up on the ones we have
Fossil didnt shake up mechanics, but it added more personality to the roster
Plus, red decks have plenty of ways to give it haste, so you can escape it, drain 3, attack for 6, and drain 3 more to deal 12 damage total
Cards like Megrim and Liliana's Caress provide damage as your opponents discard while other payoffs like Bandit's Talent and Davriel, Rogue Shadowmage punish your opponents after youve stripped their hand of resources
Put two of them into your hand and the rest on the bottom of your library in a random order. Being able to choose the best two cards from the top eight cards of your deck is pretty much going to guarantee you find what you need
If you find you need more, there are quite a few good ones you can run without disrupting the deck at all