FD is almost always polarizes matchups. In many MU's you want to avoid it at all costs against character y, while character y has to avoid it at all costs against character x.
Having FD as a starter without having 7 starters kinda favors certain characters.
Well... I hope you know that you always kinda favour certain characters as soon as you decide the time limit, stocks, damage ratio, items on/off, wario ware on/off, all the other stages on/off, stage XY cp/starter.
Tbh, as much as I can understand what you're trying to say, we have different criterias/standards/preferences as what we want to have as starters. We just don't mind, if Icys get a boost by our Stage List, because we don't care and try to actually get so good in this game the we could beat Icys on FD with our main, and guess what, we still can ban it in our current ruleset :D
Is this so hard to understand?