“The update is very small, they don't say much. All they say is that 'several issues have been addressed to improve the gameplay experience'.” My Nintendo News · 4 years ago 6.0 update? How to Update Tetris® 99 - Nintendo Support
: Small adjustments were made to enhance the overall stability and smoothness of the "battle royale" puzzle experience. How to Update Tetris 99 (NSP)(Update 2.3.0).rar
“It appears that Nintendo added 8 themes from prior events... probably so they don't have to distribute them over their event data delivery service anymore.” Nintendo Life · 4 years ago “The update is very small, they don't say much