So far, I think Discovery is 4/4. They've really stepped it up this season with some compelling stories that I'm really enjoying. Each episode is brought to a satisfying conclusion. Things that were set up at the start come to resolution by the end and I feel like it was a FULL journey to get there. Things also don't feel needlessly dragged out. I'm glad Tilly's story is moving along and not being labored across the entire season with practically no movement to it.
The episodes being on average about 54 minutes long gives each episode more time to flesh out its plot and character interactions. I don't recall the episodes being that long last season, although I could be wrong.