FormerlyHemlock
Hero
It is definitely power creep, but necessary power creep IMO to fix a glaring issue with the PHB: the PHB has no good reason for characters to ever want to be in melee. The SCAG cantrips are the most notoriously-overused parts of SCAG, because they are twice as strong as any other cantrip, but they come with a cost: you have to get up and in the enemy's face before you can use them. Finally the Eldritch Knight has a reason to care about his War Magic feature! Finally he has a plausible reason to be something other than a Sharpshooter/Crossbow Expert! SCAG cantrips are not better than well-built ranged attacks, but they are different, and rewarding in their own way.
There are other aspects of SCAG which are nice and competitive with PHB archetypes (e.g. Monk of Long Death, Bladesinger, Paladin/Crown Oath), but I don't think those are power creep because they still fall within PHB precedent. It's really only the cantrips that are power creep; but good power creep, the kind that just needs to be a one-time thing and now you're done, because the issue is now fixed.
There are other aspects of SCAG which are nice and competitive with PHB archetypes (e.g. Monk of Long Death, Bladesinger, Paladin/Crown Oath), but I don't think those are power creep because they still fall within PHB precedent. It's really only the cantrips that are power creep; but good power creep, the kind that just needs to be a one-time thing and now you're done, because the issue is now fixed.