You've highlighted a few facts about wizards that are real. However, I also can say that you're not very experienced using the wizard. Chain lightning is than a viable. In a aoe perspective. The only thing it does is jump over X amount of enemies. They are close to each other then you. It doesn't hit you. It's situational.
I will agree with you here. Chain lightning in pvp is only used when there are no fireballs. Every spell is available for pve even more so than that of pvp. This is part of the charisma and the proficiency that wizards have. Understanding when to use things and when to not use stuff. People enjoy corner hump in this game.
Chain lightning is a possibility to cast upon a ranger looking around from a corner or throwing melee weapons. It will bounce to people that are in the corner. Moving is extremely fast with wizard. In terms of fireballs. Understanding the range of splash dmg's is important. I use it for melee vs melee fights every day. The only thing you need to do is not body the other person. Make use of the splash damage to apply burn. It can be more then efficient. These are only a few examples of what it takes to be a good skilled wizard. The first thing to consider is the staff. It's not too difficult to purchase spell books whenever the Alc has them available for sale. I run spell book / Qstaff on my own.
A rogue is being a rogue. The base DMG is low due to a reason. The poison stacks really quickly. It is a great way to punch in groups for an poison build. If you're looking for rapid kill builds then rapier is the tool to use. Lock pick certainly needs more efficient grace time. There are many areas that must be adjusted for every class. If you want to learn more about Dark And Darker,please vist https://www.mmoexp.com/Dark-and-darker/Gold.html