I think the paladin is too weak compared to the other classes, for example, fighting clean against a warrior the paladin was no match as the attack was just way too low, theres no point in having really high health, becoming a tank, if you cannot deal decent damage.
Also, the cooldown for the buffs need to be shortened as they become useless as the character is only buffed for a few seconds and it becomes a pointless use of mana. The ability trees also need to be re-ordered as there is no itiative to get the the top of the trees, it is more usefull if you become a hybrid of both tank and warrior rather than just persuing one.
As well as this i think each of the classes needs class specific weapons, such as hammers or axes for paladin, swords and spears for warriors, i just really think this'l add so much more aesthetically to the game.
overall i think the paladin is the weakest of the four clases both in PvP and PvE layouts, this may be countered by changing the cooldown and power of buffs!
thanks for reading