Would the Paladin and the Ranger be unbalanced if..

[Laurel]

Would they unbalanced if they had caster level = class level, as opposed to caster level = 1/2 class level?

As they are now, their spells, upon which a large bulk of their power rests by core rules, are pretty weak -- very short durations, low bonuses, and easily blotted out by dispelling. But would they be too powerful if their magic didn't suck?

Personally, I don't think they would be too powerful no. In fact I encourage- ::hint, hint if my DM is reading::
Just make sure you don't have any Clerics or Druids, since I think the 1/2 level was to show that Druids and Clerics are the spell casters where as Rangers and Paladins are more fighters with a little magic.