The New Diddlycraft is great.
Cool/new things:
Fire, Fire breathers(ironforge) burn and kill you if you stay in them. Shabadu mentioned
this..but I had to test it out for myself
Line of sign and walls work
time quests are actually timed!
Some new quests and only had one quest not work to date!
Special effects for character powers are more visual
So far: Warlock, Warrior, Priest, and Rogue powers seem to be working fine..

Not so cool.
Dam Cluck! quest does work and still annoying
Baddies respond quickly even if you do not loot the bodies (beware)

On the plus side, I've finally been able to add my own content to Diddlycraft.  I've added a "Meat Vendor" to Azure Watch (an area my Hunter has been playing in mostly).

I'll be able to start adding quests, monsters, etc.  That should add some interest.