I like to look at problems from diff angles and see if it can lead to solutions so...
what role should each class play?
1. warrior = main tank
2. cleric = main healer
3. wizard = dps/AOE dps
4. monk = dps/Single target
5. rogue = dps/Single target
6. Ranger = dps/Single target
7. Paladin = Assist class/backup
8. Shadowknight =

/backup
9. Necromancer =

?
10. magician = Buff class/utility class/

?
11. Enchanter = Buff class/?

12. Berserker = AOE dps class
13. Beastlord = Buff class/Dps/single target
Given that all this is true I see the necromancer as being the most lost class quickly followed by the Shadowknight and Beastlord.
Necro ... do we want to buff the pet or the caster? Pets will attack from the front....they will get owned..so that will be more problematic to improve so perhaps we should leave them as they are and the thing to do would be to allow the caster to have some form of massive Lifetap that would be some form of group heal OR some kind of buff that would allow a lifetap to proc for the entire group. I prefer the group buff lifetap proc.
Shadowknight... some people like to tank with sks...I dont know why but they do... so as in EQII the sk became powerful because of the AE lifetap drains...I see how this could be useful on EZ as well. I don't think SKS should have a group heal as this class is based on making themselves stronger and not the group. So .. add a buff or proc of some sort that would allow AE lifetaps...the more you pull the more they get healed....

Beastlord ..... PEt class so same problem as necromancer...but they get to use the NS augs ...so again leave the pet...to hard to fix...I have never played this class so i don't have any idea how to fix it..
Monk...rogue...ranger..zerker...warrior...cleric...wizzy...No suggestions they seem to be working fine..if we fix some of the other classes that are weak then life should get better for these staple classes...
Pally...I love paladins... I started with 2 and am now down to just 1 in my group make up.....they are helpful as healers... adding a focus of healing would help....other than that I would save leave them be...
Chanters and Mages .....pet class again...so focus on the other ability's....more nuke? more buff? I lean towards buffs...