Hi, post what you want to be implemented by Blizzard in the expansion
General
- More Dynamic / Adjustable content so every BIG patch can change the entire world (not just the new content) (e.g : Vale of Eternal Blossom into Vale of Eternal Sorrows)
- More things to do alongside quests / raids / pvp / pet battles...etc, the players are getting bored too quickly
- Less brainless grinding / farming
- More content per patch
- New Race / Sub-Races
- New Hero class
- New models
- More Character customization
- A new continent / World / Universe
- Item Squish
- More account-wide features (Bank for eg)
- Housing (Solo, Guild and even Class)
- More guild perks
- Cross-realm heirlooms
- Racial flying mounts
- More game optimizations (Cuda / OpenCL...etc)
- New engine (very unlikely)
- Achievement points put to use (you can buy prettier furniture for your house the more points you have for example)
- More precise Auction House
- More bag / banks / slots
- More aquatic mounts
- Less dependency on add-ons (more integrated features)
- More Characters slots
Pet Battles
- Team pet battles (2vs2 3vs3 ect..)
- True ladder and rewards
Ressources
- Ores / Herbs nodes personal to each player (Less stealing = More materials = less gold sellers)
- More professions mounts
- More Transmogrification
- Professions / Materials rework
- New secondary profession, Ores / Wood working (like disenchanting), (e.g linked to player housing)
- Disenchanting-like addition to current professions to recycle objects
- Workers : can rent a worker to farm materials
Engineers :
- Make people pay for using Jeeves or Blingtron 4000
Archeology :
- More rare items (e.g. Skeleton Flying mount)
Lore
- The return of old characters (e.g. Medivh, Alleria and Turalyon)
- Emerald Dream / Azshara / Burning Legion / South Seas / Titans themes
- Less lore-focus on the humain / orcs, more on the other races / capitals / towns
- More zones involved that already exists (Kul'Tiras, Under Tirisfal...etc)
- Revamped Outland (Draenei and Blood Elf zones) to catch up with the lore (e.g using closed portals to visit the Burning Legions' world(s))
- A little rework to Northrend to reflect the new Lich King changes
- Lore-book aLa dungeons codex, we can also track stories from the quests we do
Class
- Class book similar to dungeon codex : more info on the lore, spells...etc
- 4th spec (unlikely)
- Search feature in spell-books
- More separated spell for PvP and PvE
- Less class homogenization
- Bring back the good old class quests
- More cosmetic glyphs
Mage :
- Female water elemental (glyph or spell)
Warlock :
- Viable tanking
- Renaming of pets
- Flying wings (flying mount)
Death Knight :
- Dual Wield in every spec
Rogue :
- Combo points on the rogue (unlikely, unless they rework a lot of things)
- Make Pickpocketing more fun / worth
Shaman :
- Viable Tanking
Priest :
- Cosmetic Glyphs for Shadow priest : Sha Form / Animations / Spell Effects
Hunter :
- Pet-less spec
Druid
- Shapeshifts armors so we can see the gear in different forms
PvP
- PvP servers with no flying mounts (after dismounting in a contested zone)
- Solo Queue for Rated Battlegrounds
- More World PvP zones
- 1 Versus 1 Rated Arenas
- PvP daillies with fun objectives and better rewards than the normal BG dailies (kill 10 elfs / mages / in less than 5 mins for eg)
- PvP rewards only obtainable in World PvP
- PvP Scenarios
- Players can now be dismounted while flying (parachuted to the ground or no fall damage) so flying will be no more 100% safe
- New game mods for arena : like 4 tigers attached that attacks random players from time to time (SPARTAAAAAAAAAAAAAA)
- Bring back PvP ranks with a little rework and statistics (e.g Season kills / rbgs / arenas)
http://www.wowwiki.com/Honor_system_%28pre-2.0%29
- Captcha / Visual logging...etc before you enter battlegrounds = less botting
PvE
- Healing Target Dummy
- 10 levels expansion
- Scenarios available at low level
- Old Lore scenarios (e.g Battle for the Undercity)
- Leveling Modes : slow leveling without any XP buffs (guild perk, heirloom ...ect) and a fast leveling for those with 5 characters already at max level
- Karazhan readjusted lore and mechanics (ala Scholomance). Medivh helping you reclaiming his old tower can an eminent point for his return (unlikely)
- Multiple starting zones
- Harder heroics
- Upgradeable Weapons / Armors
- Groups quests
- More Environment incidence on the players : Cold zones will make run at a slower speed , Heat zones will get you exhausted, Creepy zones will make you fear and run ...etc
- Day / Night cycle
I will keep updating the post with so and try to give more detailed ideas