True, still though under most occasions i'd rather just take the risk and go ATC unless i'm packing clusters.
If someone revisits this thread after an ordnance fix... Yeah, if missiles get good AC.
What I've found with ATC was that on low-PS pilots (Tempests, Colzet, Storms, possibly Alozen), it was not very effective. You will very likely move before your opponent, so you are still rolling 2 dice in the first round of combat regardless of engagement range (because you weren't in range for a TL until they moved).
Once you have the lock you're still moving before them, and keeping certain pilots in arc is quite a challenge from a low PS bid, especially with the Advanced's speed. You can't really slow play them like you can with a B-Wing. The slowest you can go is a 2 forward (or a 1 bank) with a barrel roll backwards, but that gives up your action and - if you want ATC to kick in - once again leaves you with unmodified dice.
PS2 Tempests with AccC are annoyingly hard to kill, make great blockers because of the barrel roll, and when they have targets to shoot at are guaranteed to land 2 hits every single time. (It occurs to me that this same sentence applies to Blue Squad B-wings with Accuracy Corrector as well; the trick is that they have to pay for theirs and give up a red die to use AccC. The Tempest pilot does neither of these things.)
I encourage you to try both; maybe ATC on lower PS pilots will work for you. I struggled with it and found I greatly preferred the consistency of Accuracy Corrector.