I couldn't get into Diablo I/II, not because of the viewing angle, but the consequences of that coupled with a really low resolution monitor. Too far away to see any graphical detail... The gameplay was ok I suppose. Due to a system crash, and poor backup habits, I lost my main push into Diablo II's campaign, so there was no way I could start over and have it feel fresh, so I abandoned it. It's obviously been a long time but if those were my main concerns, then I might enjoy Diablo III (albeit in small doses). Due to my tastes and preferences, I'm 99% sure that I won't be purchasing this title before or during the initial release. I'll be looking for a bargain in 2013.
It's interesting how they seem to be taking two steps forward in development, then one or two steps back, with the intention of taking three to four steps forward at a later date. Two steps forward to create something. One or two steps to take it out, and plan another three to four steps forward to A) put it back and B) make it better. I bet there's some suits somewhere who are really frustrated and don't understand what's going on. Some employees might also be frustrated trying to determine who really is in charge of the development (behind the scenes).
I hope it turns out to be a great game, but if doubt hits a critical level, presales and release sales will suffer, and pirating may also increase above normal levels for a time until the dust settles and everyone decides for themselves if its worth picking up. We may be reading in December of 2012 the top 5 pirated games of the year, and this one may be on the top of that list.