I'd clik "PvP ilvl scaling is a BAD thing", but it would be not exactly true...
The only point where there is sense in it is in their favorite paid "competitions", since they are divorced from game and have neither place for "progress/experience" nor base for RPG customization - I mean those that are for public fun, with artificially ready-drawn characters and items. Although it's possible that items that are given to contestants - equal there, which means that you don’t need to scale anything... I'm confused, but let it be "others"... but in other cases, scaling, as was and remains sh*t for this particular game.
More information here and here.
No, last time it was somehow good - in MoP, because stats and pvp-
characteristics, this is the only possible right solution.
ps. OP, this is too much unoriginal, I have too many links regarding such discussions. And I don’t even have anything original to add here except them.