I have a floor frame. When I first got it I realized that it had the same limitations that you just discovered - there are certain directions that are impossible to quilt
What I did is I taught myself to quilt with my thumb. I had to practice a bit, but now that I have the knack my stitches look good coming and going.
I got the idea from a quilting program that used to air on PBS - Hawaiian Quilting. I use a tailors thimble for my thumb, and a Roxanne thimble on my middle finger. The best directions that I've found on how to do it are in "That Perfect Stitch" by Diedre McElroy.
I believe Alex Anderson once demonstrated quilting away from your body by putting her quilting thimble on her thumb. Mine doesn't fit, but the tailor's thimble has worked better for me - with my thumb tip exposed I can grab the needle better.
I hope this helps you enjoy quilting on your "ceiling" frame.
Janet