Sil
Veteran
Having looked (on wowhead) at a dozen or so random items from dungeons, and stuff found on twinkdb, all of them looked to be significantly squished and match the screenshots OP posted 
Seems to affect a lot of (perhaps all??) things up to and including BFA dungeon and raid gear. Compare these legs from Live https://www.wowhead.com/item=159386/anchor-chain-girdle?bonus=6516 to beta https://www.wowhead.com/beta/item=159386/anchor-chain-girdle?bonus=6516 . iLvl stays the same but much less stats. The SL dungeon gear I looked at had no squishing or real changes comparing live to the beta.
The ring we all know and love, compare the amount of stats Live https://www.wowhead.com/item=159458/seal-of-the-regal-loa?bonus=6516&ilvl=25 to the Beta https://www.wowhead.com/beta/item=159458/seal-of-the-regal-loa?bonus=6516&ilvl=25
Seems to affect a lot of (perhaps all??) things up to and including BFA dungeon and raid gear. Compare these legs from Live https://www.wowhead.com/item=159386/anchor-chain-girdle?bonus=6516 to beta https://www.wowhead.com/beta/item=159386/anchor-chain-girdle?bonus=6516 . iLvl stays the same but much less stats. The SL dungeon gear I looked at had no squishing or real changes comparing live to the beta.
The ring we all know and love, compare the amount of stats Live https://www.wowhead.com/item=159458/seal-of-the-regal-loa?bonus=6516&ilvl=25 to the Beta https://www.wowhead.com/beta/item=159458/seal-of-the-regal-loa?bonus=6516&ilvl=25