2 + 2 = 4 That wasn't hard at all right?
2 x 2 = 4 still not hard
2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 524,288 Now my question to you is is this equation hard or challenging? It requires work, but more or less, you already got the concept of 2 x 2 already. So when you have a boss that you've already doing the same mechanics, just hitting harder, my question to you is this hard or challenging?
The second boss of heroic Dragon soul doesn't include new mechanics, it just gives you one extra ooze. I already know how to dps down an ooze. I've been doing it since BC. So how can that be a challenge if I already know how to do it? In ulduar heroic Mirimon had all his mechanics, except in heroic the floor is on fire. Instead of healing or dpsing harder, players now had to approach it from a different angle. So why do we have cheap mechanics? Because it is easier to develop. Why design a whole new concept when you just increase the base values. Blizzard has already said they are lacking in manpower and they now have to design 5 different raid encounters, it is easy to blame the guy getting free epics while we are busting our %&^$ off on the same mechanics. I hope you now understand the difference between hard and challenging.