well if you don't like FPS combat you probably won't like Darkfall, simple as that. Everything in the game has to be aimed, even melee swings - there is no targetting.
The PvE and crafting aspects of the game are not impressive at the moment, but they have made some giant leaps since launch and show a lot of potential for the future.
Small scale PvP consists of not only who can aim better but really who can make better use of stealth and terrain to get the advantage on the enemy. There is no moving the camera around like in WoW or Warhammer to see who is around you - if you want to see something, you have to turn and look in first person or in a very limited fixed camera 3rd person mode. You can crouch through tall grass and someone may not realize you are there until you are right behind them, swinging at their back. Sometimes you can be at 10 hp and escape from someone who was just looking right at you just by cleverly dodging around rocks and trees until they lose track of where you ran. Other times you may get caught out in an open field and be totally screwed.
Large scale PvP can consist of anything from large AOE fire walls and acid clouds covering the battlefield to things such as cannons and warhulks (tanks) used in siege warfare when conquering an enemy city. I've seen fights up to 500v500 for control over key cities, which were known to crash the server when the game first came out, but nowadays they have made a lot of fixes/tweaks and its actually pretty impressive how well the game can handle a thousand people in the same area. There is also naval combat with cannon sea battles, although there are still some balancing issues and boats are so expensive that not many people use them at this point.
The world is huge and it takes about 3 hours to get from one end of the map to the other. Runestones exist but are expensive and only available for 1 use. It's both good and bad... having a huge, detailed, immersive world like this is something I haven't really seen since Asheron's Call, amd finding secluded spots to hunt is important since it's all FFA PvP and you could get jumped and looted by anyone, but at the same time, you may find yourself losing a lot of time traveling when trying to meet up with your friends or discover some place new. I guess this depends on the player... some people like getting lost and wandering around exploring. Others are impatient and want PvP every time they look left or right. Although, if you look in the right places, those constant PvP hotspots do exist in both small and large settings.
wow. probably enough of a wall of text for now. I should submit this to a game magazine and get paid for it.