Why are T2 and T3 structures going to be leaving less reclaim? The change was made because it was too dangerous to attack with T3 units because losing a fight meant donating a game-winning amount of mass, right?
You don't push with buildings, so I don't see why they need to have their reclaim values reduced aswell, except for consistency reasons (which are thrown out the window with the weird reclaim values per tech level anyway)