There weren't really any mods for D2 either, but I still played that game for years. They're still going to patch it, and hopefully add a few things along the way with updates just like they have with D2. Prolly an expansion pack at some point. If they make it as solid as D2 was, its hard to get tired of the game, especially when they reset the ladder and your need to start a whole new set of characters all over. That's part of what kept people playing was ladder resets. I personally get tired of so much DLC and mods always coming out for games.
I'm confused, how could you not like/get tired of free content coming out for games that users make? Sorry if that sounded like an insult I'm just confused and trying to figure out what exactly you mean.
P.S. There were plenty of D2 Mods, people are still playing them even now