Hello there,
modding wow got my curiosity just a day ago and after I saw what other people have done - now it has my attention. What I am interested in making is quite huge - certainly not one man job. But befere I will start doing anything I want to make sure that what I want to achieve is doable. I am programmer myself so all scripting languages used in wow dont scare me.

What scares me is a vision when I have to figure everything out by myself using trial and error method (bleh). So essentially documentation / support is really important for me. Below I will list features that interest me and if someone could say if they are doable or not I would be obliged (also mention if there is some documentation on these topisc if possible please ).

-redesigning combat system (skillshots / aoe instead of point'n'click)

-changing character class / talent trees while character is in game

-forbiding certain player(s) from entering some area of map

 -a system which would make some game object become transparent if they obscure players character (client only)

-character staying in game world after player logged out

Looking forward to your reply guys! Cheers!