The current goals are specifically set to the amount we reached last time, so for all we know the old goals might be hidden tier goals beyond that point. Well, one can always dream at least. ^^;
Though it's possible SBS, between the plethora of title purchases beforehand and DSS delay controversy, simply estimated funding potential to be significantly lower this time around and didn't want to go too high for that reason, which is fair...
Still, every shiny reward tier that ends up out of reach leaves a degree of disappointment, which isn't beneficial, so if anything having hidden reward tiers should be considered for the future anyway if they haven't done so this time.