I don't think anybody says it sucks. Bishop, CR, Vault, Governor all do not suck. But they are not just two Labs with a little help for your opponent, but, all in all nets you about a $5 card advantage compared to your opponent, which, as it is a $5 card, is about as much as you would expect.
So you really should think if you really need the power of two Labs, and how much, and how much your opponent needs the power of one Lab, and what you can do with the other options of the Governor. And Epoch's reasoning was, I think, that if you have no +Buy, so just can buy one Province/Colony, and have no other options to/don't think about remodel(ing) some VPs [which is kind of strange if you play Governor, as Governor by itself (for remodel) is a card that likes large handsizes] or whatever to really profit from the larger handsize other than pushing $7->$11 for Province, maybe the extra Lab that both of you get is helping him more than you.