I don't agree with these notions of Brotherhood being "right" or "wrong." I have absolutely no problem with a writer re-interpreting their own stories in as many ways as they want. It's not like it's real history, and even with that, as new things are discovered, our perceptions can change.
With that said, I've found this series to be totally enjoyable. It has great moral and philosophical content, action, and a plethora of emotional moments. I didn't watch the first FMA series, but I thought I would give this one a try and I am really glad I did! Once it is finished, I think I will go back and check out the original next to spot the differences and compare the two. I wonder which version I will think is best...