They are actually turning back to that. The are at least 5 new different variants coming up of their S4 "flagship": S4 regular, S4 Google Edition, S4 Mini, S4 Active, S4 Zoom, S4 Mega.
And that's just for one "phone brand". Imagine if they do this to every other phone brand of theirs, which are already being called all "Galaxy". Samsung strategy is becoming a mess again. It will work in the short term (a year or so), and then backfire badly.