Most of the technical points have already been gone over so I'm going to comment on one that was almost touched on by Like:
habitual patterns:
If you run a mech with arm lock on (all center/side torso weapons so no need what so ever for it to be off) for a few hours you will 'untrain' yourself from paying attention to the arm reticle. It is simply a matter of habits and for this reason that I always leave mine off.
I really notice habitual patterns when I go back to a light after being in a heavy or assault for a few hours, especially back to my Spider (possibly the most agile mech in the game with the Commando running a very close second) after being in a lumbering no JJ all torso weapon mech. Even worse if I go a few days (leveling up that big lumbering mech) without playing lights.
I'd even say that I notice the advantage of arm lock being off more when I'm in one of those lumbering no arm weapon mechs because as I'm trying to bring my weapons on an enemy I have that quick moment of "Damn if I only had a weapon in one of my arms" while in the heat of every mass brawl.
Edited by Bellum Dominum, 20 February 2017 - 02:00 PM.