I really enjoyed the concept of Payday more than the gameplay itself. Loved the moment to moment objectives but I think the maps really distracted from teamplay by allowing people to wander too far or to too many different heights. A smaller map (ala L4D's twisting corridors) could really open it up.
The lack of players, too cautious to splurge on a (quite cheap) new title can't be underestimated in how short the life of Payday was, but the insane difficulty on Hard also didn't help. The meat factory in particular was just that central tower and death descending from all sides.... very poor mapmaking/pacing imo.
Hoping this hits console.