I'm not a H16 basher - but the pitchpole tendancy of the H16 is because of the flat deck and the angle of the deck at the bow. Once that is submerged the boat meets a lot of resistance all at once. All catamarans will suffer this to some degree.

The wave piercer A-cats are rounded on the top deck and although they too will definitely pitchpole, they're are designed to run with minimal drag with the bows submerged.