This is what I have in mind for round blunt bow, for a small cruising 30ft X 14ft catamaran. ''Cruising'' Not Racing!!! High volume, so that it does not suffer too much from overloading. Bow entry would not pierce the water like a pointy hull but rather try to climb up on top of the water or push the water at slow speed. The hull shape might be able to go up on surf while going down a wave on a beam reach. This hull shape would not allow a lot of lateral resistance therefore it needs a very good daggerboard or centerboard to counter leeway and give a somewhat descent upwind sailing capability.
Now would this shape be prone to heavy pounding??? My intuition would be that if the wave frequency is short, yes. But if the wave frequency is high, No.
I think that this hull shape would be outperform for sure in flat water by a nice fine entry bow shaped hull but the lost in efficiency in flat calm water might be worth the extra loading capacity of a small cruising Catamaran.
I was watching a comparison on youtube about SUP displacement hull vs SUP planning hull. The conclusion was that in flat water the displacement SUP was faster while only paddling but as soon as the wave and wind pick up the planning SUP would be able to surf for certain stretch because the bow would not burry under water and the wider beam of the board. At the end the planning SUP was a better choice when wave and wind pick up. I hope everybody understand that you can't really plane on a SUP by only paddling, it needs to be a combination of paddling, wind and going down a wave. Therefore the comparison might be good since I don't think it is really possible to plane with a cruising catamran, but might be able to get a little bit on a surf if the beam of the hull is enought while going down a wave similar to the SUP planning hull regime.
Also it probably would not be prone to hobby horsing and/or nose pitching being a full round blunt bow.
Having no experience at all in catamaran design, am i totally out of wack thincking this behavior of such a hull.