I think either of those quilts could be quilted with lines in one direction. The quilting lines don't have to follow the seams, especially with modern quilts like the ones you showed. As long as your quilting lines are close enough together to suit your batting, you'll be fine!
I don't know if this will help, but I drew in some quilting lines on the second quilt. They follow the seams half the time, and the other half they don't:
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I personally like quilting this way; it's easy to manage (no turning corners! no meandering!) and has a modern feel that appeals to me.
If you're stressed, remember: bigger blocks piece faster! Check out this quilt - those blocks are huge, but the overall effect is very nice, and would probably work well with the Tonga Pink Lemonade fabric.
http://www.incolororder.com/2011/08/...-tutorial.html. Since your daughter already admires your work, don't sweat it - you know she will love what you make for her.
Good luck!