Sorry I haven't responded earlier. This is in response to your question about making the Banana Split Salad for diabetics. My sister is diabetic and she has made this so she can eat it. If you think this needs to be sweeter you can add Equal or another sweetener. My sister never adds the sweetener as she says that it is sweet enough. By the way, I loved your idea of adding the crushed pineapple. I'll try it the next time I make this salad. Hope this helps! If you have any other questions about it let me know. I've also sent the regular version too for anyone who may have missed and wants it.
Note 1: my sister washes and drains them so she can eat them as there isn't really a substitute - her nutritionist gave the ok.
Mix together lemon juice, sour cream, and Cool Whip. Add cherries, bananas, and nuts. Mix well. Place in Cool Whip containers and freeze. Thaw slightly before serving.