I see that V6 has thicker, blacker curves than V5 and even though this can be handy for modelling it can also smudge up the appearance of curve drawings.
V6:
V5:
For my current kind of work I would be preferable to have thinner lines ala V5.
So please make that an option.
(I see that when I draw a cube or other 3D geometry R6 uses the thinner curve drawing “look”)
+1.
It makes V6 models look much more ‘cluttered’ with edges and curves.
This thread was started just 40 minutes ago and I can also verify that GPU tesselation makes the curves look a bith thicker.
Tesselation ON:
Tesselation OFF:
If this is the price to pay for the speed increase then I am happy with that, but if somehting can be done with out decreasing draw speed than Yes Please 
+1
I also adressed this in a recent topic.
It would be nice to have a “thin line” appearance according to Rhino5
An insteresting test solution implemented in latest BETA:
