From what i have seen in videos(and leaked ones) i can say without a doubt that the combat is very easy and has a incredibly low skill cap.
The only way to miss is to aim wrong and keep on aiming wrong, if you aim towards your opponent at the start of a attack animation(especially funny with power attacks) then just run 10meters away from the same enemy/mob you will still hit it, the combat holds your hand an incredible amount and sure hope this is fixed for a higher skill cap. No matter how bad you are you will hit your opponent as it is now.
Also all the aim based abilities i have gotten can only be activated when you are actually looking at an enemy, you cannot do them while you are out of range and you cannot miss. Once again incredibly low skill cap.
You cannot have such a basic aiming system and only 5abilities, the combat in the game is by far it's worst point and combat in an MMO is very important.
Otherwise the game seems to be very well done, but with combat like this PvP and PvE will be boring as hell.