Unions toe ratchet being difficult to release does not translate into holding better. The locking teeth are on an independent pin within the ratchet housing. Their ability to hold the ladder has nothing to do with the way the rest of the mechanism pressures it to release. Their is NO benefit to its design and to be completely honest it's a dated racthet mechanism. Do it the way Burton/Flux do it, or use the industry standard, a 3 pin with a release lever. No reason not to.
I disagree. The 3 piece design of burton and flux results in stripping. Any tweak and it skips ladder steps. I'm not saying it's bad, and can't be averted with careful pressure, but it's just a drawback of this design.
The Union design is perfected. They've profiled it so low there's no room for error. It's superior in hold and ratcheting. And the release is easy when you apply thumb pressure on the top and lift with the index finger simultaneously.