Yeah this does sound like the kind of game I could sink way too much time in to...
But I'm with Gianthogweed. I'm hooked on the pen & paper again and it's so much stronger and more pure than any video game! Ever since we were kids, me and my friends looked forward to the day when video games would allow the level of freedom and creativity that tabletop RPGs can provide, but twenty years on, the digital gaming media seems just as predictable, linear, and one-way with the narrative as ever.
Of course, Hasboro/WotC is making big promises for the DM tools in the next online D&D video game, but even if it is the best game editor released in a decade, it's going to be a very tedious creation process and it's going to rely on whatever stock content WotC provides. All indicators suggest that "collecting DM content" will be just as expensive for digital assets as it is for physical ones.