While there havent been any substantial changes since yoshida has come in,
there are legitimate reasons why-
A) you are not paying for the game-SE are under no obligation to hastily implement change.
B) Proper development on the battle system, ie the core of the game only started after the february battle survey where the dev team could assess their direction.
C) Families of people on the development team were affected by the tsunami,
Yoshida himself said it took a month to get back to a normal schedule.
Be a bit sensitive and dont forget there are more important wordly factors.

Put things into perpspective, this is only a game, you are not paying for it, if you dont like it go play something else, I'm sure you will come crawling back when they release epic end game gear anyway.