- Savitar is the one responsible for all of the major changes to the timeline they are not merely a result of the Cosmic Retcon of time trying to repair itself.
- Think about it, everyone bad that happened was directly centered on Barry. Plus the acolyte knew Caitlin would become Killer Frost. He took the opportunity to change time to weaken Team Flash.
- And place his acolyte Alchemy in close proximity to Barry.
http://tvtropes.org/pmwiki/pmwiki.php/WMG/TheFlash2014S3E7KillerFrost
FollowingWMG / The Flash (2014) S3E7 "Killer Frost"
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