I still think of the original size classes... from when Hasbro first created them for Beast Wars - Basic, Deluxe, Mega, Ultra.
It is so hard to avoid confusion when they keep changing the class names.
As for the tag line/subtitle - it's something we have to live with, as Hasbro has to create a new subtitle every year on a line that goes longer than a year, just for the retailers... as per the "keeping the line fresh" concept.
If they don't change the packaging, theme, gimmicks, subtitle, etc each year on a line that lasts more than a year, retailers are going to go for something else that is "new" for their shelves instead.
Not that kids & Parents are going to care, as they'll still just buy whatever is a good toy/toyline or currently popular. Unfortunately, retailers force successful toylines to be changed or replaced, just to please themselves with the thought of having "something new" on their shelves... which only they know or care about.