Interesting idea - don't think this is a shape that I would have thought of. I see this more as a starting place for designs - the indents, however, suggest a marking point for the start of some rather structured design - maybe with the lot of dots and or stripes. You know - the kind I never make. ;-)
There is a reverse version of this available too - if you think that having raised ridges would be more useful.
I did struggle with this shaper more than the last two, being never very happy with the ends.
The largest of the cavities did seem to be easier for me - but I like a little more meat on the ends of the beads - I just hate it when you go to clean a bead and half of the end falls off!
Still - an interesting concept. And the grooves would certainly lend themselves to wire wrapping ... .