I kind of frowned when I learned there is no degrading of armor or weapons, or anything. That's not realistic at all..
The degradation of weapons and armor in MW and OB wasn't all that realistic either. MW was a little more realistic in that lower armorer skill meant that repairing reduced the maximum health of the item but at high skill it was just as unrealistic as OB. The application of the same exact system of degradation across all item types is likely the most unrealistic aspect.
I would maybe have a hybrid of the old system and the new so it worked in stages like it does now but made it so items still broke eventually and permanently. Can't say for sure without playing though because we don't have all of the data necessary to make such an anolysis.