I don't think there are devs on Civ 6 anymore, not for a long time.
Don't forget some of the Firaxis staff acknowledged some very easy bugs like wrong text indications for Eurekas. If they intended to make another patch, they could have pushed those easy fixes a long time ago.
Not necessarilly. I think a lot of People misinterpret the "
Thank You, from Firaxis!" as the end of the Game. Because if you look more closer at the wording, you will notice that most, if not all, of it was referring to NFP, the "Final Season Pass" of the Year, and the "past/last Year", and not to the Game as a Whole. They never said/claimed or even hinted at that that's it for Civ 6, but the contrary, because durring that Time they even said to keep reporting Game Bugs.
Here is a quote from Carl Harrison:
The New Frontier Pass may be done, but we will still be around. Reading your forums, watching your streams… reading your mind. We look forward to continue to watch you all play and enjoy all that Civilization VI has to offer.
I'm not expecting new Content like NFP, but at least some Bug Fixes and Game Updates are to be expected. And since we have those 2 new unknown DLC Deposits included in the DLC section that only contains DLC stuff, it's out of the question that they are
just a Game Patch or a new Collection. It's very likely that they contain real Content, however small or big they are.