Where did 'DS36A' come from? Do you know what diverse even means? If it is true that the rumble is more 'diverse', it just means it has a wider range of rumble than the DS2 does. So that might mean it can rumble weaker, but it can probably rumble just as strong.

I really think you're thinking too much about it. The rumble is just fine. The battery life is just fine. You've nothing to worry about. Just make sure you get a controller that says DUALSHOCK on it (which should be easy if you're buying the system brand new, since they don't make the SIXAXIS on its own anymore).