I do not know many of the details, but the scuttlebut I'm reading in in this thread alone makes me curious and apprehensive at the same time. Speculations on the finished product can be fun, but it's just too early to know for sure.
That being stated...I would hate to think that there is only one way to look at alignment in the scheme of the game overall. Incorporating alignments that have any meaning in an MMORPG is a bold move, and I am interested in the result. Unfortunately, this anticipation seems to be causing a little anxiety. I understand that. When I was a child, I would get very nervous about going to see a doctor, always afraid I would have to have shots. I can remember several times I pitched a fit over shots. As it turned out, the shots weren't nearly as painful as I feared. I hurt more from the aftermath of the screaming and weeping than I ever did from those little hypodermic needles.
You may be asking yourself why I wrote all that down. Here's my answer. I wrote all that to write this: we sit here analyzing the benefits and detriments of alignment in game we haven't yet touched. There seems to be a range of emotions on the topic. Good. However, we don't know what's going to happen. I think most of us will play the game, alignment system or not, and try to find ways to make the system work to its best advantage for us. The anticipation of pain is an illusion, and it won't be nearly as bad as some are making it sound. So, maybe the (figurative) temper tantrum should stop. There's no such thing as a PERFECT game.