Yes, yet ANOTHER AL thread. But, this is different, I promise!
In the beginning AL was a novelty, something new and interesting. "You mean I can be invincible AND knock shields out AND destroy vehicles effortlessly?" Then we all quickly realized it's nothing more than a spammable, cheap tactic used to unfairly keep the user alive. Things like shedding grenades, blocking swords, and using it for cheap beatdowns are just a handful of the annoying tactics we've witnessed (and possibly used).
Here is an up-to-date list of all the AA's available in H4
Notice whats missing? You guessed it. AL.
Unfortunatly, it seems that map-breaking AA jetpack will be staying, but that's another thread. However, this to me shows that 343i has been listening to feedback, and rather than 'fixing' the already unfixable Reach, they've poured resources into making H4, dare I say it, a good game.
[Edited on 10.29.2012 8:58 AM PDT]