Yeah NG is definitely faster paced. For a browser game, your target audience are those people who do not really have the desire, commitment or time to sit down and play a game that requires installation and follow through.
The best fun this game had for me was the pre-life leech nerf. Now finding gear feels like a grind due to the slow pace of it all. Ideally as a player, at max gear, max level, any class should be able to roll through 5 up non-stop Hell farming should their build be solid.
Regarding DoTs and pace, if you kill a mob with 40 seconds left on the DoT timer, then all that contribution is wasted, but if you let it tick, it is also wasted because, frankly, you are fucked and dead.