I don't think it's an Old/New change, but rather the fact that some of the new code messed up the lighting for most characters, and the easiest fix was probably to remove one of the sources so it didn't bathe our eyes in glorious, neon light.That being said I hope they find a fix soon since I much prefer the brighter colours for most characters (although admittedly some of them do look cooler with a broody atmosphere).
Onslaught Ultimate
Just posted a similar thread about graphic changes and how kabam could add graphic settings for Mobile
It's simply a bug
Armour so bright and radiating that it can burn the eyes of any enemy who even dare to look at you vsDC movies lightning which put people to sleep in cinema halls.