One thing Ive noticed, is that cast time and channeled abilities, cough templars cough, are severely gimped in pvp due to multiple factors. The damage is not burst, its easily avoidable, and you can be counter attacked. This is especially an issue when Line of Sight factors are present.
To give an example, if there is a rock or tree present to use as line of sight, and an enemy simply runs circles around the rock, a templar has absolutely 0 chance to kill that person. All of their damage is channeled, or cast time, or even accumulated damage which you cannot do when a person continuously uses line of sight. Jabs/sweeps will never do its full damage, backlash will never feed enough damage from other sources, and radiant oppression will constantly be canceled due to line of sight. Things like dark flare will fail the majority of attempted casts as well.
I personally have shut down templars using these techniques, and now playing a templar at a high skill level against other players of high skill level I can experience this phenomenon from the other perspective. Meanwhile, take nightblades for example, which is currently the best class in the game for dueling and the second best class in the game for open world pvp behind magicka sorcs, all damage is instant and the burst damage and comes with multiple debuffs.
Line of sight hardly effects my nightblade who can land a fear, deathstroke, surprise attack burst over and over and kill anyone. All damage is instant cast, all damage comes with numerous debuffs including heal debuffs, snares, armor debuffs, etc. Line of sight, while still useful, is very manageable as an attacking nightblade, but it completely shuts down templars.
My solution to this is to make all channelled and cast time abilities only have a line of sight check upon initial cast, and after the first hit all subsequent hits are gauranteed to land. Rebalance the skills with this in mind. Templars need to be made viable not simply by balancing numbers, but also by balancing mechanics which currently make them subpar.
Ali Dreadsabre -Necromancer
Ali Sabre -Nightblade