I agree, perfect alignment should not be required with slow moving Titans. It breaks the ability.
On other hand, it may be the only way to balance the ability, without nerfing it. But its true, it may be a pain to use against human opponent, who pays attention, because he may move around his frigate/cruisers constantly preventing you activating the ability at all, and even microjump maybe not much use to you in such case.
However, i see this as good opportunity for some nice microing, so perhaps it should stay, as it is - difficult to pull out, but if you manage to do it properly, it feels far more rewarding. I agree with Nichtganz, that proper functionality - not just pulling the frigates, but instagibbing them, is a must in such case.