Baseless speculation, but: Could it be that the show's writers and directors have the same diminished attention spans as their audience? :)

We're all in the smartphone age today, not just the children. And we probably all feel the psychological effects of its use. (Those who use smartphones at least). So it might be that a scriptwriter from a few decades ago would feel fine with a slower pace, while a modern scriptwriter would feel the pacing was too slow when reading the same script.