Ehm... not to be a nitpick, but how many game companies do you know that aren't in it for the money? FF7 itself was purely a gamble to make money, so was FF6, FF5, FF4, FF3, FF2 and FF1. Oh sure they've regretted it badly this far, oh yes. Besides, fans have been begging for years for remakes "oh pleeeease remake FF7 it would be so good and everyone would buy it and I would play it every day and sleep with it under my pillow etc. etc.". Now they actually are returning to one of the most popularly demanded content, namely more FF7, and the "purists" are complaining it's bad and will somehow "pollute" their own impressions of the original.
Come on, they aren't even out yet. At least play them before condemning them, and pretend they're not FF7 or whatever if you feel they don't "fit". And there's always the option of not buying it. I don't know, I just don't see what's bad about giving a lot of people what they want and the rest of us at least a choice [of playing it or not]. Square knows they could never make a one true FF7 sequel that everyone would like, so they're making these small add-ons instead. Chances are that most fans will find some part they will like and purchase.