Feels weird to me.
I much preferred, when you could just click the ability and it would start using the maw. I understand, some people didn't like that it wasn't targetable, but the current implementation seems ... unwieldy to me.
All of the clunkiness comes together especially when surrounded by corvettes that circle the titan - the ability becomes virtually useless. When on autocast, the Titan will target one of the corvettes and try to rotate to face it. The corvette, however, is faster than the titan, so the ability will never go off.
When manually casting, you need to try and click one of the corvettes that are moving into the titan's line of fire. Maybe I'm bad, but those tiny, fast things are hard to click!! Also you need to pick one, that's on the same z-axis as the titan, otherwhise the titan will need to tilt up or down first ... and the corvette will outrun it.
To me it seemed much better, when you could jump into a bunch of enemy ships, hit x and just start eating them. The radius and range of the ability is fairly forgiving, so there's really no need for the titan to line up perfectly.
imho