With time I've realized that allowing the use of books like the "Complete" or the PHB2 was a mistake. I should have known better that with the three core books was more than enough. What was done in the eagerness of adding flavor to the game, in the end became a cumbersome corset for me. I don't need more rules, spells, feats or classes to do what I intended to.
So then it's decided, once we've finished EttRoG I plan to go back to the roots, back to 1e, or B/X, or some of the OSR rules set like Swords&Wizardry or Labyrinth Lord.