You're mistaken Puntable, squish will have to happen eventually again, due to the nature of the system. Assume that each tier has to be, say, a 10% upgrade over the previous tier, and assume that ilevels is directly proportional to power. To upgrade a tier above ilevel 10 would be ilevel 11. To upgrade a tier above ilevel 100 would be ilevel 110. The upgrade would be exponential, and it has to be. Going up 100 DPS when your baseline is 200DPS is amazing. Going up 100 DPS when your baseline is 10k DPS is not as amazing.

There will be item squish in the future again, it is unavoidable. Expansions give a large boost to the item level in one burst, but they are not the root cause of item level expansion. The nature of exponential upgrades will force it again, and exponential upgrades has to stay to make upgrades meaningful.

Is there a solution to all this? I really don't know, and I don't think Blizzard was able to come to a conclusive solution. Item squish sounds like a no-brainer, but it isn't a permanent solution. Then again, maybe a permanent solution isn't needed, who knows.