Magnet Pull in lower tiers seems kind of so-so too. Registeel, Metang @, Aggron, Bastiodon, Bronzong, Steelix, and Forretress all have access to Earthquake (and Escavalier has Drill Run). It needs Fire Blast to come close to effectively trapping Scizor in higher tiers, and Roost shenanigans can make a stall game for Alola Golem (to be fair you could EQ on the prediction). Once Fire Punch returns to its repertoire it could at least function to trap some of the slower Steel-types that aren't as offensively threatening a bit easier (Forretress).
For what it's worth it's a cool flavor change to Golem. Electric Explosion, outside of still having an issue bypassing a Pokemon immune to it, sounds damn appealing in lower tiers at least.