So, if I'm understanding correctly. And PLEASE correct me if I'm wrong. On WT15, all my gear will be downscaled to 44? If this is the case.... It feels inherently messed up. if people are having trouble getting to the final CT's, it's already punishment enough to have to farm under leveled gear. But to make me less effective at doing it? Why?! Why take away what I HAVE earned???
On world tier 15 enemy level is 42, so if you come with gear level 50 yes the damage is scaled to level 44. Which should be quite the advantage without making the game silly and broken. Without overleveling it was basically impossible to die in those circumstances and gameplay basically didn't exists.
Additionally dowsncalling doesn't affect benefits from attributes or synergies.