1) Complete lack of Bleed Damage
One of the strongest skills for all classes is something that can be casted on an opponent and continue to do damage by itself. Every other class has an example of it. Witch Doctors have Haunt, Barbs have Rend, DH's have Impale - Chemical Burn, and Monk's have Exploding Palm. Wizard's strongest bleed dmg skill is Spectral Blades - Deep Cuts that does 45% Weapon Dmg over 3 seconds. All of Wizard's skill that do dmg set over time are based around the fact that opponent/monster will stay in the same place.
2) Lack of Burst dmg
PvP main attacks are based around single target damage skills. Let's see Wizards burst dmg skills. Arcane Orb does a straight pathetic amount at 200% WD. Meteor is better at 260% WD but it has a very long animation that becomes obvious to avoid. Orb is also very easy to dodge. Explosive Blast - Short Fuse at least does instant dmg. Wizards have no skills that can compete with WD's Spirit Barrage, Monk's Bells or Dashing Strike, Barbs HOTA, or DH's Impale. They do less dmg and are harder to hit opponents with. They also don't have any dmg skills they can really spam without running out of AP quickly.
3) Arcane Dynamo and Signature Spells
I really hoped to be able to figure out some combo of Arcane Dynamo and Signature Spells to pull of a sick dmg burst. But alas all of Wizard's Signature Spells are pathetic. It became obvious very quickly that pretty much all the Signature spells proc rates have been nerfed into the ground because of critical mass. It became nearly impossible to get 5 stacks of Arcane Dynamo quickly. The only skills of any possible use is Magic Missile - Seeker. One of the few Wizard skills to have 100% proc rate. But it has a long animation and a short range.
Honestly though Wizards's have only one skill even worthy of the effort of Arcane Dynamo. Archon - Arcane Destruction. 1600% WD times 1.75 works out to a one shot move if it crits against almost all characters. But with a 120s timer and awkward mechanics it makes it nearly impossible to pull off.
4) Be able to cast over or through walls
Wizards complete lack of attacking through a wall or over one severely hurts any chance at survival. One of the reasons WD Spirit Barrage is so good is that it goes over walls. The only skill that seems to be able to cast through a wall is Hydra. Maybe it is just me but any spell that is coming from the sky should be able go through a fountain or a wall. A Meteor or a blizzard can't penetrate a wall? Give me a break.
5) The Good
Only a couple skills Wizard's have that can compete with with other classes. Ray of Frost is the only skill that does good dmg and provides some kind of CC effect. Combined with it's dmg boost in 1.08 and Cold Blooded it is a must for any Wizard. Storm Armor vs Energy Armor. Energy Armor is the best defensive boost a Wizard has but Storm Armor's strong attack with it's long range with auto attack is to much for any defensive boost a Wizard can have. Storm Armor is another must for Wizard's. Teleport - Calamity is an excellent damage attack that will see a boost in 1.08 with Teleport being fixed.
6) Reasonable fixes
- Fix slow time so it actually works in PvP. Currently it does nothing against any ranged attack.
- Be able to cast Meteor/Blizzard though/over a wall. I think Arcane Orb - Celestial Orb should be able to go through walls also. Arcane Torrent over walls would be a good boost also.
- HP regen needs to be addressed. WD's Blood Ritual does 2% HP regen in 1.08. Galvanizing Ward should at least be able to do that. Without any regen from Skills or passives Wizards are forced to get it from gear and that takes up valuable gear slots.
- Signature skills also deserve dmg boosts. They are all very rarely used by any Wizard's in Inferno.
Critical Mass is probably the single best PvE passive in the game for any class. Because of this all Wizard's PvP skills suffer. So any skills with a timer on it can be reduced by CM and AP is regened by APOC so all proc skills are nerfed. Wizard's are built around high IAS and CC%. But in PvP where CD% is king and IAS has much less use against moving targets it puts Wizard's at a huge disadvantage. Even with the fixes I recommend I don't think it would be enough to help Wizards to be competitive in PvP.