Is there anyway to change the attributes of the players class after the charactor has been created? Ie. I want light armor specialization rather than heavy, etc.

Open the console and type showclassmenu.

Make the desired changes.

DO NOT click Done.
While the class menu is open, save your game to a new slot and exit.
When you restart, the changes are there.

Your majors will change, but I believe you do not get the bonuses you normally get.