I found one of those rare interviews that are really interesting to read. It's with Blizzard's creative director Chris Metzen and Senior VP of Business Operations, Paul Sams. I'd paste here excerpts but it's really worth reading from the first till the last word.
Focus On: Blizzard Entertainment
We're used to these nice, finite, closed-ended games that we can power through, put on a shelf, go home and sleep for a month. This is just a completely different kind of monster - it will not end.

Recent comments
8 weeks 4 days ago
Posted by: Stranger
9 weeks 5 days ago
Posted by: MickSqueaks
10 weeks 6 days ago
Posted by: John BS
12 weeks 19 hours ago
Posted by: Thenewchumscrubber
12 weeks 3 days ago
Posted by: Stranger
12 weeks 6 days ago
Posted by: Stranger
13 weeks 5 days ago
Posted by: Stranger
14 weeks 4 days ago
Posted by: Stranger
14 weeks 6 days ago
Posted by: Stranger
15 weeks 4 days ago
Posted by: alexlunaros