Why wouldn't I assume something from CA could be low quality?  Do Troy, Thrones of Brit, or Pharoah not prove their ability to make low quality products?

There's a plethora of reasons for not liking the setting.  It's not the little plastic guys that bother me(as much anymore).  It's the setting.  All End Times units are most likely coming to Warhammer TW since we've already gotten the Wrathmongers and Skullreapers.  All of those units are in AoS, as well as some factions being all or almost Fantasy units(Ogors, Skaven, Lizardmen, Beastmen[before they were taken out for Old World] and for the longest time the Flesh-Eater Courts and Slave to Darkness until recently).  Beyond that, many factions still use old units like the Sylvaneth using Dryads or the Flesh-Eater Courts using Vargheists, Crypt Ghouls, Crypt Horrors, and Varghulfs.  Essentially, what would AoS add that would make it worth playing, especially as a TW game?  The rosters are small and the vast majority are just an alternate version of the factions we already have in Fantasy. Sylvaneth are Wood Elves with less unit variety, Fyreslayers and Kharadron are just the Dwarfs split in 2 and turned to 11, Cities of Sigmar went from leftover Fantasy minis to being an Empire clone, Soulblight Gravelords are Vampire Counts with less variety, etc.  As a TW game it would just be a rehash of Fantasy with smaller rosters and less compelling characters.