It primarily fixes a critical security flaw in the netcode related to a buffer overflow.
However, if you never play the Tour tracks and do not care about online leaderboards, sticking with v2.1.0 is stable. Mario Kart 8 Deluxe Update -NSP-
Disclaimer: This information is for educational purposes regarding hardware you own. Modifying your console violates Nintendo’s Terms of Service and may result in a ban. It primarily fixes a critical security flaw in
For the average emulation user or offline CFW player: The Booster Course Pass DLC requires at least v2.0.0 to function, and the quality-of-life improvements in v3.0.3 (specifically the framerate stabilization on the Piranha Plant Cove track) transform the experience. Mario Kart 8 Deluxe Update -NSP-
Resolved minor graphical glitches and online connectivity issues.
Cons