That's pretty damn lean.
I'm not the best judge; running 195/50.15, but do you think due to the tread block design they are more susceptible to block squidge/shuffle?
Yeah no doubt. The whole tyre is softer. If you used them in the summer for performance driving they would wear quite quickly I imagine. My car is definitely more of a softy with these tyres, but it has loads more grip and traction in this weather than my summer tyres had. Loads more. You need a little more steering input to get the same response, but you quickly get used to the subtle change. It's also a good deal quieter, and the ride quality is better.
This the tread pattern on mine. Not my actual tyre.