They've always been at that level.
Carpenter would totally say yes to anything that was offered to him if the money was right. That's all he cares about. Morricone may not, but if you think Hans Zimmer is frothing at the mouth to score films like The Boss Baby, you're dead fucking wrong.Carpenter and Morricone and Hans Zimmer do not say yes to everything that they get offered.
Also, Trent has specifically stated that they've been offered films and they've passed on them because they didn't feel like they were a good fit for them. Just because a film may not be your cup of tea or have loads of music attached to it doesn't mean that they're phoning it in.
Oh yeah, and one more thing: the amount of music that's in a film is not up to the composer(s). It's up to the filmmakers. If a director wants a minimalist score, then that's what they'll ask for. It's not as if a director asks for a bombastic score and Trent & Atticus say "nah, we're just going to give you this because that's all we feel like doing". They're working in service to whatever the filmmakers' vision is.