What? Isometric is superior for controlling complex action, which is what Diablo is. Time has nothing to do with it.
Not to mention if you actually watched the video you'd see that it's isometric mouse control already. I HIGHLY doubt they'll scrap it now.
1)yes it has, and thats why its standard to use WASD in this day and age. a standard which WoW helped set.
2)I did watch the video(WTH would I comment if I had not?) and I never asked them to scrap it. I asked them to add WASD and third person view - See guild wars and neverwinter nights, which have both Point and click and WASD.
Not to mention that any other display method would be highly inefficient for a game such as Diablo III and Starcraft II, just like any MegaMan game that isn't in 2D just plain sucks.
WASD would obviously suck for an RTS, however Diablo and starcraft are not the same thing.
As for your MegaMan argument, - it has nothing to do with MegaMan not being able to translate into 3D. Just like Zelda made the jump, and like Metroid and Super Mario and Metal Gear solid and so on and so forth, so can MegaMan.
People just got to be willing to move with the times.
My own theory is that Blizzard dont want their Wow Audience to go to Diablo III. Thats why they seperate the two games with different control schemes and such. it makes sense. WoW is a money hat with over 10 million subscribers. It does not make sense to take players over to a free game that will only give them revenue once.