Hmmm... 4, 1, 3, 2
The fourth season was the most Roddenberrian of them all. If you told me a year ago that's what I'd think would make something the best season, I never would've believed you. But now that I've actually seen it, I know this is where the series should be.
I still love the first season of Discovery, but it's effectively a completely different version of the show.
In comparison: the second season of Picard -- which I'm also a fan of for different reasons -- feels like Harve Bennett meets Bob Gale & Robert Zemeckis, so far. The TOS Films and the BTTF Films were my two favorite movie series, growing up. I could probably quote the complete scripts for all those movies. So definitely not something I see as a negative; just interesting the way in which this season of PIC and this season of DSC have been different.
I almost did a Modern Trekkies if The Motion Picture Was New parody since this season most closely paralleled TMP, and to add to the parody series I'd had going before, but then I noticed two things: a lot of the more reasonable critics of the series had begun to recognize the changes to DSC this season and recognized it as a positive (which I have taken note of), and the people who didn't like this season were mostly making the same complaints I understand that people were complaining about back in 1979 and 1980, which effectively rendered posting that type of parody moot at best and counter-productive at worst.