I am a little disturbed by the things I have been reading and watching in videos... both PvE and PvP.
One of my favorite types of characters to make in any game is an attrition type who doesn't have a lot of burst but gets stronger the longer the fight goes on and the enemy runs out of gas.
I really wanted to make a "dark caster" type of character using siphoning abilities from Nightblade, with a few other dots and health leeching abilities from the Mages Guild, Destruction staves, and Vampire spells. I thought this would be viable in pvp as a DoT build with lots of kiting and health leeching to keep me alive while my DoTs and steady damage killed my enemy. In PvE, I thought a DoT caster would work just like a normal mage but instead of spamming high damage spells, I would keep my DoTs up on all targets and use whatever filler did the most damage.
However, after receiving input from multiple PvPers who are higher level in the Beta, it seems that you cannot survive in PvP using these methods... that burst and CC are what is most important.
In PvE, it looks like each class has certain spells which are just calculated as the highest dps and you use those and thats it. I am not sure if all of the DoTs have been tested well or not, but anyway... it is concerning me because i was really looking forward to making a DoT/leeching style caster.