LoL twitter released an apology about the nerf of Blue Essence recently, alongside an article describing what they "intended" and what they are going to change. (note: not a single mention of hextech chests)
They "intended" to increase the amount of BE new players are getting and make it the same amount for normal players as last season (I don't believe that) but it turned out that everyone was losing up to 75% Blue Essence gains. So to fix that they are buffing BE gains through the pass as of patch 25.S1.3 (around 3 weeks from now), hoping for up to 30% increase in BE gains from last season.
Here's the problem: The LARGE majority of BE from the new pass is concentrated at the END of the pass with repeating missions. Meaning, you have to grind the ENTIRE PASS, and then GRIND MORE to equal the BE gains that you had before the season.
They will take everything from you, return a quarter of what they took, and expect praise.
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