Gotta hit the Spectre with that power nerf. Instead of the OP Day of Vengeance/Infinite Crisis level Spectre. Bring him down to Fate, Phantom Stranger, Enchantress or Mordru's level. The JSA has Fate, Shazam, Johnny Thunder and sometimes Black Adam on the team. Spectre is yet another magical member but hyper-inflated on the power scale. I would do a work around with Spectre's powers. By passing the spirit to other notable DC heroes who have died. There have been so many over the past 2 decades. That way, the new hosts for the Spectre have to learn the ropes and explore their powers all over again.
Or we kick him off the team and use him every once in a blue moon.