>>49204078I'd say so as someone who thinks base SwSh is the worst game in the series. The DLC is literally peak 3D Pokemon in terms of map design, the stories are pretty much optional and non-intrusive (and despite that they're still better written than the base game's), and Crown Tundra in particular has a ton of cool extras to find if you bother exploring all of it. I'd argue that they got rid of, or at least addressed, most complaints from base SwSh bar the ugly graphics and relative lack of difficulty.
Mileage may vary though, you might not be into the stuff I listed or a variety of the other things it does. I say go for it, but only if you got SwSh a while back/got it in discount just to be sure.