In Phreak's most recent Patch Preview, he talks about how the Shojin changes will affect Hecarim and whether Hecarim players will adopt the new build. As a comparison, he mentions that Zeri players still continued buying Trinity Force long after Zeri's interaction with it was gutted.
Patch preview video with context for the quote
I wonder how much of this effect comes from the item recommendation system. Since recommendations are always delayed by an entire patch, items that are now "bad" will still be recommended as top tier.
Should players be reading patch notes more carefully, or is there something Riot could do to let players adopt new builds more quickly?
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