Forgetting the lessons of the past.

GC, did the new design team that take over deliberately ignore things learnt in expansions past, or did you think the following decisions your team made were actually an improvement?

- AV was meant to be an outdoor PvP zone. They scrapped that. You brought back the concept in WG.
Result: Unplayable lagfest. Heck, WG has crashed the entire Northrend on Tich before.

- "We tried arenas without pillars and found them to be not fun" - Kalgan. You brought back the idea in Orgrimmar arena.
Result: Everyone hates the arena. Fix incoming.

- The original arenas had environmental hazards. They sucked and everyone hated them, so they were taken out. This time around, they are back.
Result: Everyone still hates them.

- In classic, PvP was Naxx geared melee with a pocket pally two-shotting people. In BC, defenses were buffed to the point where PvP was more than a castsequence macro. Then in WoLK you added a billion cool damage abilities without adding much defenses.
Result: Even after some substantial nerds, PvP is still a complete gibfest.

So, was all that deliberately done, did you decide you could do better than the people who designed BC, or did you simply forget about what sucked in the old days?