I dont see a problem here with the stamina tick changes, as long as we can opt back and forth between them. Personally I will not be using the new quicker ticks, but it will be better for some.
If you allow players to switch between tick intervals this will cause the player to have a new hourly tick if they revert, so I would make sure that the coding is done soundly before its introduced so players wont lose stamina ticks, or worse find a way to abuse the game mechanics.

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