"Nao" was the developer. I remember his words defending the capabilities of RSX in PS3. By the way, it´s one of the few games in PS3 with 720p native res and MSAAx4.
Really, the problem with those games was (among others) the lack of knowledge of the real capabilities of the hardware, an unfriendly hardware if we have to believe several notable opinions around here.
If you ask me about Heavenly Sword I won´t be impartial simply because was the first game of the generation that I played and I was absolutely surprised with the beauty of its graphics, the art direction and the fantastic voice acting. The story was short, self-contained and, surprisingly, the end was no as many could expect, being in fact really pessimistic.
There were many comments about its game mechanics, being critisized its value as a hack & slash game. The game was conceived as a showcase for the platform, and in that respect their values were right. I believe that that the game is pretty even by today standard and in some points a real beauty, and interesting to play. The final combat was in fact terrific. The rest... I cannot complain. Too short maybe. But intense and very, very amusing. Their main character had a lot of personality, and it´s a shame that the IP hasn´t been continued yet. There was potential there. But it can be seen just in the opposite direction: the game remains as a hidden gem.
Definitely, it deserves at least a try.