Re: Deciding on the Moon
ISNA is better. It just tells you the day when moon will be visible. If the calculations are correct, there is no way you could see moon before that. If the calculations are not correct, ... improve them.
So they are not really taking away "seeing the moon" part. They are just telling you, when u be able to see it. Its like weather forecast, only that weather forcast cannot always be very accurate, because of far too many variables. However moon orbit and speed is fixed, so its much much easier.
I get what you saying but isn't the same as in the Islamic calendar? We know when to look for moon alhamdulillah. ISNA just adds more politics to what already is present. And the people who follow ISNA (at least where I live) say the date which ISNA selected is the day of EID. Nobody can challenge them. That's the attitude they have.