I agree the Sow is potentially very good as an alpha strike model, particularly with a hog whisperer giving him reactivate and Old Major potentially pushing him further up the board. I was thinking about situations that could make your opponent's alpha strike falter or divert.
A model like a Yasunori could come in and kill key models and dart around to see another fight outside of a Sow's range. Yas kills something in the way like a engaging piglet, Killjoy pops out, maybe Yas hits him a couple times, splashes black blood on himself and then Killjoy smacks the crap out of him.
Corner case, sure, but sometimes I think it could be easier than trying to set up a charge.