LogFAQs > #976859208

New showrunner brought in a new approach to writing episodes, which has resulted in better scripts for the last couple years. But it's also still hit or miss, with a handful of standout episodes per season and still a bunch of mediocre-to-decent ones (but they still seem to be better on average than the past however many years). Season 34 was also an improvement over 33, so the trend will hopefully continue.

edit: He also wanted to stress that this doesn't mean the show is back to how it used to be, and probably never will be, but also the creators aren't trying to do that. Instead, it's simply become a different kind of good Simpsons.