Honestly, I still feel Cloud would have wound up with Tifa. Aerith's dialogue in the date always sounded to me like she knew Cloud wasn't who he said he was and confirmation that she only really likes him because he reminds her of Zack whom she's still holding a torch for. I'm pretty sure had she lived to see the truth about Cloud she probably would have dismissed herself from the triangle and taken up more of a "big sister" role for Cloud and Tifa much like she has in the post VII Compilation material.