I think the reward should be small, since shields and turrents would become an endless renewable supply of resources for the people destroying them if they remained at the default, which was indeed too high. However, I do not think removing it all together is a good idea. Removing it entirely heavily penalizes players for attacking the enemy if there is a shield or turret present at a location, and lets face it, some locations will ALWAYS have a turret and/or shield, and this means that you would ALWAYS get penalized just for attacking the enemy regardless of whether you win or lose. Providing a small reward will effectively allow the game to continue a bit longer for both sides of the game, while simultaeneously demanding that players be more careful and tactical about whether or not they will attack a location that is not a neccessity to complete the main objective and win. With a small reward, you will lose forces, and not fully recoup losses from turrets/shields at fortified areas, but not be heavily penalized in the form that it could potentially end the game right away.

I agree that there should be some reward for destroying objectives. This reward is partly what differentiates Power Core and Annihilation game modes. I would remove the elite point reward for sure though.