I love the function of my Woodcrafts, but working on them can be a bit of a pain. the only 'adjustment' is lengthening or shortening the shift-rod. You can't move the pegs at all. On my bike, i still prefer them, because it's a 1-rod setup, versus 2 with a pivot point on the vortex version, but that may not apply to your bike.
I haven't looked at the vortex 'sets to know if they suffer from the same problem, but the peg itself (on the woodcrafts) is attached by a single bolt from the BACK side of the peg.
so if you crash, the bolt is what's likely to bend or break. On one hand, if you're good with an extractor tool, you might be able to salvage the peg itself and only buy a new bolt. On the other hand, it's a PITA to hold the peg with vice-grips, remove the entire rearset, and tighten that bolt that's on the back side of the assembly.
my casual viewing of the vortex's leads me to believe the peg itself just screws into the plate, or it's all one piece. Definitely easier to grip those pegs.
and FWIW, i've never had any problem with slipping on my woodcraft pegs. 2 different bikes and about 20 trackdays. Only 'failure' was a peg rotated when I didn't tighten it enough.