Handicapped players are likely a very small minority of the player base.
Look at the posts by the few blind players, who were using follow (in conjunction with specific sound effects and teamspeak/ventrilo) to do battlegrounds with their guild mates.
There were a couple of stories like that, on the Blizzard forums following the removal of follow.
Definitely also a minority case.
But follow was removed, despite the negative press received and the impact upon the minority.
If Blizzard decides the IWT/CTM combo is helping bots/boxers/whatever-their-target-is and that its removal would be beneficial to the majority, they're not going to care that it was a feature put in to help a very small minority have an easier time with their game.
Their track record proves that.
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