The Japanese players that I know who hated Melty Blood were only familiar with the original PC version of the game, before Re-Act. One of my friends from Saitama who plays with RX (famous Urien player) all the time was shocked to learn about Act Cadenza.
I love Melty, but I also know that it has some very severe limitations and issues, which I hope will be addressed in Actress Again. I really hope they get it just right within one or two more revisions. But that doesn't mean it's right to bash the game as it is- especially considering that it's come a very long way, and through several years of dedicated development.