If KI wanted to build an addition that added to the park's coaster count and not spend as much as a bigger coaster then I'd agree. If you wanted to build something that would be a capacity nightmare and have long, slow-moving lines through the day all day then I'd also agree. Kings Island, quite honestly, already has issues with capacity on many of their rides so I'm not sure that would be the way to go, coaster-wise anyway.
Having said that, I'd agree with many others that the park needs a B&M invert. Some might say "well, the park has Invertigo", but look at Cedar Point. They have both Raptor and Wicked Twister, so this isn't unprecedented by a CF park.
Ok we have 2 vekoma inverts Invertigo, and runaway reptar.
And 3 Vekoma rides overall. IMO, thats 3 too many. B&M and Intamin all the way!