While I'm loving Legion, one thing that I'm noticing and concerned with is how high the numbers have become and remembering how it affected MoP when the numbers were similar.
Now I'm terrible at math, but I believe the way things work is because the numbers are just so naturally high it makes upgrades far more powerful then they would normally be. Someone only 10 item levels higher does a far higher amount of damage, including tanks.
Now I remember previous expansions if one knew what they were doing they could put up fair numbers comparable to the rest of average players who were higher item level. I remember in TBC my hunter buddy ran into Karazhan with blues and was pulling 2nd DPS in a group of people with full epics.
In Cataclysm where I was far more casual I could always pull top two despite not being as geared. Where as in MoP since the numbers were so high your damage would increase at a higher rate than normal.
I'm starting to see the same thing in Legion at the start and it will only get worse. This will get frustrating for DPS players who are behind the curve and can barely out damage their tanks. I mean WTH is the point of bringing them?