Argyle King
Legend
And that is exactly why your history is revisionist. The errata took time to appear. The game as it stands in mid 2011 is less unbalanced than the PHB only 4e of 2008. You do not get to add the errata to the game back then because the errata did not exist back then (hell, they're still continuing with nerfs and tweaks to the PHB). Adding the errata is happening at the same time as adding the new options.
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Actually, I wasn't giving a history. My original statement -which was assuming errata- was that I did not feel D&D was balanced; likewise, I used the example I did (assuming errata.) It was a statement which did not address history; it was a time neutral statement which simply compared and contrasted older material against newer material.
If I don't consider errata, then my answer of no becomes a more emphatic no. The orb wizard was nowhere near being balanced against anything else. It only gets worse as better feats, powers, and items become available in the later books. The Orb of Ultimate Imposition is the easiest example which comes to mind.
There's also the hybrid rules in PHB which would allow you to get rid of the spellbook feature in exchange for pretty much anything from another class which would be better. It only takes on feat to get back your implement mastery feature... so, I get my orb features and possibly some cleric healing or invoker control (possibly even a few monk powers if I want better melee prowess.) Yeah, the orb only works with half of my powers, but how many powers beyond sleep do I really need when I can cause even a solo to auto fail?