Only the best will survive

I'm probably going to get thrashed for saying this; but I think Dark Eldar are going to be a master-class army.  I've read through the entire codex multiple times now and I'm convinced that only the best generals are going to have any success with them.  Dark Eldar, by design are going to be the hardest army to play in 40K.

Everything they have is paper thin and in this edition, paper thin is just dangerous.  Some say that Eldar is a delicate army to play but that's really just bullshit.  Eldar is actually one of the most durable races in the game.  They have access to 3+ re-rollable cover saves, Energy Shields on their transports and Holofields on their tanks.  T3 means very little when everything is well protected and taken care of with re-rolls or staying power.  Dark Eldar does not have this luxury.  Not at all.  They are built based on speed and precision.  Since there's no staying power at all; you have to make things happen in perfect unison or fall apart.  There's no sitting around and waiting for your opponents to make a mistake.  If you make a mistake in any of your phases, you will die.

Movement and positioning is absolutely critical for being successful as Dark Eldar.  You need to outrange your opponent's weapons, claim cover saves whenever you can, and know which units to move and which to commit.  How you move your units will be the only way you will keep them alive and keep them successful.  Two thirds There's no such thing as T4, 3+ armor saves or AV14 transports.  There's only AV10 open-top and a bunch of T3 girls wearing battle-thongs.  I know this more than anybody; I play Space Wolves, Blood Angels and Death Guard.

There is going to be a huge influx of Dark Eldar players, that I'm sure.  I'm also sure that most of these players will crash and burn and sell their models within a year.  I say this with confidence because that's exactly what happened years ago when Dark Eldar got their new book and players wanted to give them a whirl.  After getting stomped, beaten and destroyed by other armies, they jumped ship and went back to their boring MEQ.  How fitting that the weak get filtered out and only the most cunning, evil and arrogant remain.  Natural selection at its finest.