They do look good. Of course so many essential wardrobe items these days are in knits so they're essential for modern dolls too. I rediscovered the joy of sewing wovens again from the masks and doll's clothes. I just had no desire to do that until last year and the lovely doll's stuff is really boosting that. Another joy they have given me.
Did you mention which legging pattern you used? I couldn't spot that scanning the previous posts.
Yes, when it comes to knits you do have to get out of some of the old habits borne out of decades of sewing wovens. Just learning to handle the knits really gently so not to stretch them during construction is the thing above all I think. Even then, after 7 years of nearly only knits I still had problems with the doll's basic turn under armholes & necklines stretching out... but not since I started sewing a stay stitch line virtually on the 6mm sewing line and using that as the guide to turn just enough so it doesn't quite show on the edge.