The issue with year one weapons is they are re rollable and can have perk combos that are no longer available. They will always be better than year 2 weapons so I'm gonna blame the weapons.
Yet the only year 1 weapon you still see a lot of is thorn which can't be re rolled. How many times do you actually see a felwinters, or benevolence or something like that? Not very often at all. Most of the weapons being used are still year 2 weapons
to be honest.. I haven't seen them lately in crucible but since this week Y1 weapons are savage where light level doesn't matter. problem is tho that, people are gonna use them in Iron Banner and maybe even Trials since, if u are a 319, and u equip a Y1 weapon it puts you back around to 300 which is still very competitive.