Personally, I don't feel that you really got the main point of your argument across well enough. Still I get what you're saying. I love armor lock, but some people just abuse it. However, like the others, it is a completly legit armor ability with it's own advantages and disadvantages.
Armor lock lasts exactly 7 seconds (when fully used). It's also good for downing shields, this includes bubble shields and even holograms (yes, I tested both. holograms are essentially just walking energy barriers). It's EMP can also disable vehicles and, with proper timing, can even destroy some. Also you can look around during and snap-turn when exiting armor lock
However...you can't move, which means it's easy to get surrounded and out-numbered. Somone with good timing can place a grenade to explode just as one exits armor lock, with no time to excape. You can't armor lock in mid-air, even if your just up a little bit because of splash damage (the concussion rifle esspecially with its heavy slpash effect can easily subdue an armor locking opponent).
...yeah more stuff like this would have been nice and would have helped your argument. Of course, this is just my personal opinion...the proving your point thing that is, the rest is proven fact...(^_^)