It is all relative. The ice turret shield pre-balancing would not have made enough of a difference to be chosen in lieu of a storm, dark flak or mage supershot. It wasn’t that it did nothing, but that it didn’t do enough.
I criticized the ice flak heavily when it was released because a 1 second freeze with a low DPS was not valuable enough to draw attention over, say, a dark flak or fire flak supershot. Fortunately, those within PG I have contact with listened to those criticisms (and those of others in the community) and buffed the ice flak’s attack and special duration in the subsequent rebalancing.
That is the last I will say on this, as it is not the correct thread for it and you are not a member of my team.