If there are still no convincing reasons, please allow selecting any Greater Spell Focus feat for wizard meta-magic feat!
See my past thread asking why:
http://forums.ddo.com/showthread.php?t=311274


E.g., my arcane archer wizard spends all main feats on archery related feats and still has no room for precision and improved precision. So rest assured, he's not gonna be on par with an already 'gimpy' ranger AA.

Yet he cannot be an optimum wizard either. There is no room to take the GSF feat required for either full archmage or pale master.

Any other examples?