See, I don't find modern Trek dark or overly violent, except in passing moments. The swearing is to me a good thing, too. I take your point about the sloughing off, but (and this is down to personal taste) I find the visual darkness of this season oppressive, along with the amount of wanton shooting and cruelty. It seems like all the TNG characters don't hesitate to kill and then vaporize, and the uniformity of this tendency suggests it's a matter of Matalas's taste rather than a character-driven choice. The way the aesthetic and narrative choices seem to be prolonged is simply too much for me. It feels like the show is one big rut of ugliness to me. I realize it's different for others.
We'll have to agree to disagree there. I found there to be a lovely lyricism to Season 1, from Picard's vineyard to Kestra's imagination to the general look and feel of Nepenthe, to the sliding in socks down the corridor, to the space orchids. And there were tonal shifts, like the masquerade in Stardust City Rag or the total TOS throwback with the android planet. For me, those moments of weirdness and wonder, the sheer ability of the show to play all sorts of notes, gave the proceedings a well-rounded feeling even when the execution didn't entirely work. The simple fact of there being a variety of settings helped immensely for me personally.
I know I'm in the minority here, though!