Perhaps you don't like raised designs on a swirl blanket? Therefore, here is one where the swirls are actually lines of voids.
The full article about this pattern is here:
More info about project photographed on Ravelry.
Rainbow Swirl Free Crochet Pattern
Finally, this swirl blanket uses a square spiral to denote the moving center. In fact, it uses two, because the colorful one is offset by a white one.
Spin The Wheel Blanket Free Crochet Pattern
While the base of this swirl blanket is rectilinear, this pattern also uses a swirled weal to give it a sense of motion. I like the gentle contrast.
Raised Bunchberry Square
A raised center makes this floral granny square stand out. This is one of 36 free crochet patterns for 6 (15 cm) squares by 30 different designers included in the Mystery Lapghan Crochet-A-Long. This pattern includes photo tutorials for the special stitches. Skills used Basic crochet stitches: chain, double crochet, single crochet, slip stitch Working in rounds, increasing, joining new colors, working in chain spaces, working in the back loop Special stitches: beg-cl, cdc, cl, FPsc (with written explanation and photo tutorials included in pattern)
Crochet Velvet Post Lines Throw
Cozy AND textured, this velvet blanket is the absolute king of bulkiness and drape. Truly, it's the perfect companion for a lovely evening, a hot tea and your favorite book.