If 8th edition dark elf book is coming out soon (in year 2013 maybe?), then I would like to see these things changed:
New plastic characters on foot and mounted on dark steed and cold ones
New plastic dark pegasus kit
New plastic manticore rider
New plastic dark riders
New plastic harpies
New plastic chariot
New plastic witch elves, executioners and black guard
New plastic cauldron of blood kit (chariot)
New palstic Avatar of Khaine (see below)
Keep the eternal hatred
cheaper corsairs (hand bows should be 12" range)
cheaper dark riders
Cauldron of blood should be a support chariot with some basic support rules and some bound spells (same style as empire ones).
Assassins should be cheaper or they should have 4++ save as skaven assassins.
Manticore 5W and 5+ save.
New murderer steel giants (like in rulebook fluff) - Maybe they should make them Avatars of Khaine. Maybe a giant size model. 2+ save and 5++ save, MR(1). If it is a giant sized model, S7, T6, W5, it should have heroic killing blow rule. Unbreakable. 275-300 pts. If it would be an ogre sized model, then it should be 3 - 10 unit size, 2+ save and 5++ save (MR1), maybe normal killing blow S6, T5, W3. Unbreakable.
12-15 magic items (dark elves are more magical race than empire and orcs for example, so they should have more access to magical items. Same thing for high elves I hope.)
Some magic item which gives protection against shooting for characters and their monstorous mounts. Pendant of Khaeleth 50 pts.
Hydra 225 pts and add the spit shooting attack choise.
Shades to get poisoned attacks.
Dark magic a bit more powerful. Druchii sorcery should be +1 to cast.
Khainite characters and units to get magic items.
RBTs should be 80 pts.
What would you like to see?