-Multi-passenger Engineer-only flying machine. Would look something like this: http://www.wowhead.com/npc=50262
-Wormhole Generator: Capital Cities OR Dimension Ripper: Goblin Slums (Or Bilgewater Harbor)/Ultrasafe Transporter: Tinker Town (Or Dwarven District). Same possible side-effects as the ones that currently exist.
-Jeeves 9000 (With access to your faction's Auction House). Longer CD, but also stays for longer.
-Up to date trinkets that can be used to reflect certain spell schools (Like Gyrofreeze Ice Reflector and the other Fire/Shadow ones).
-Dimentionnal Warper: A small device that lets you teleport a few yards away (Think Blink, but with a shorter distance, longer CD and the chance of malfunctionning and instead being teleported very high in the air... don't forget your parachute/glider!)
-Gnomish Engineering: Gnomish Life Ray. Trinket, siphons life from nearby enemies and heals an ally/yourself. Can occasionnally siphon your life instead.
-Goblin Engineering: Sapper's Rocket Launcher. Trinket, fires a barrage of rockets at enemies in a cone in front of you.
So, do YOU have any ideas for Engineering?