Wizards do get better with age
[You must be logged in to view images. Log in or Register.] there is no doubt about that. Sunstrike in kunark is a beast.
Wizards are very useful, but yes, they are totally mana dependent as they don't have a pet etc. But then the same could be said about druids or clerics. Pet classes were always the most preferred in classic, but that's why the later expansions started helping out the other classes.
Shammys got torpor in velious, wizzies get ridiculously awesome nukes in kunark (PB AE's for AE groups are awesome). So, yeah. A wizard is still good in classic, and they'll get better
[You must be logged in to view images. Log in or Register.]