What's been updated in the blacklion chests?
Read the patch notes.
RIP City of Heroes
https://forum-en.gw2archive.eu/forum/info/updates/Game-Update-Notes-September-29-2015/5543811
Improvements
- The Black Lion Chest has been updated. Keys are available in the Special category of the Gem Store for 125 gems.
- Tradable finisher unlocks have been added to the Black Lion Chest as rare drops. To discover which finishers are available, check the unlock instructions for each finisher in your Hero panel.
- Metabolic Primer, Utility Primer, Guild Influence, and Boost Enchantment Powder have been removed from the Black Lion Chest.
- The drop rates of all miniatures in the Black Lion Chest have been reduced.
A lot of folks that were hoarding keys in anticipation of a change used them after the patch. I imagine that the new finishers (with high-gold value) probably also encouraged some folks to buy keys with gems (although, the gold:gems exchange rate didn’t change much, so that might not have been a big deal).
According to Reddit posts by Dulfy and Wigglecandy, it seems the drop rates didn’t change that much for anything except account-bound minis.
(edited by Illconceived Was Na.9781)
I hardly call finishers having high-gold value as they range from 10-50g on the TP, most in the 20s. Not when the average new one ticket skin goes for 80g or so.
RIP City of Heroes