ESM = Elder Scrolls Master
If you're going to spend two years telling the world that you definitely are not creating Oblivion with guns, then you might want to consider, oh, you know, making a tiny change to the very first thing that many people see when starting the game that suggests otherwise.
It shows how little work they did on the backend of it. It is essentially a standalone mod.
Seriously have you even fucking played it yet? Or did you install it and notice that a lot was in common with oblivion.
If you delve deeper into the game you will realize it is much much better then oblivion. It has a deep story with lots of sidequests that have their own lore attached to them. It really is an amazing game.