a well built liner lock is easier to open and close than most other locks out there
Which ones? Other than the ram lock on the pocket bushman, I can't think of any that are harder to open. I find most are easier to close as well - axis, arc, ultra, hawk, cbbl, compression, balisong, rotary, bolt action, etc can be closed in one motion without putting a digit in the blade path.
This thread is about liner locks that have worn across the tang. liner locks have also proven to not handle shock or static loads equal to other locks of similar construction quality
while still remaining simple and allowing for grippy scales on both sides of the handle.
The lock is mechanically pretty simple, though does require precise fitting for best performance. It seems all locks except for the frame lock have scales on both sides. Even then, some frame locks are machined for scales on the lock side.
I personally believe there is nothing wrong with liner locks, but there is also nothing superior about them. Just a solid design and a novel concept of using the existing components of a folding knife in a new way (obviously not new for us today, but Michael Walker had quite the epiphany

)