Was Cissnei supposed to be Elena? Since she said that's not my name, and Elena was the only girl in the Turks I can remember, I am wondering that's what they were eluding to.
Nah, she's not Elena, just another Turk. He 'real name' is just alluding to whatever you named her in Before Crisis. There's plenty of Turks (maybe around 10, at least?), but most of them are in hiding by the time Final Fantasy 7 (the main game) rolls around.
I think the best part about this is it shows how big a faggot Cloud really is. In Final Fantasy 7 he STEALS zacks identity basically, and pretty much completely forgets about him except in TWO SCENES. Zack was like the BEST BFF EVER and Cloud shits all over his memory AND steals his fucking girlfriend. What a douche.
It wasn't intentional. Due to the Jenova Cells in Cloud's mind, he unintentionally replaces his own past with Zacks as a subconscious way to fill in the time gaps, so he could function. He didn't do it on purpose, it was Jenova's influence on Cloud's mind that made Cloud mix up his own past with Zack (and he really believed it himself)
As for my opinion of the game, it was pretty fun! I wasn't a fan of all of the story sequences (the game could have done without Genesis/Angeal and whatnot), but several clarifications of the story, the Wutai War, the Nibelhiem incident, Zack on the run with Cloud, how they met, and Zack/Aerith's relationship, were done really well, and I'm glad Square gave us a second look. I liked the voice acting, and except Angeal sounding a little stale at times, I think it's really solid. The gameplay is fun too. Normal IS very easy, but Hard Mode is another animal entirely. The game is really worth the game in Hard Mode, and that's what really drives me to play. Overall, I like the game, and it's very solid.