Patch notes from 3.1.0
https://en-americas-support.nintendo.com/app/answers/detail/a_id/45405
Some big takeaways from patch notes:

got slammed with nerfs, his smashes now have more endlag - most notably, he got a hurtbox increase(?!)

got almost nerfed across the board as well; all his self-damaging attacks now inflict more damage on himself, and FTilt and FSmash got nerfed

most notable nerf is probably FAir having less knockback

got her FSmash and FAir knockback nerfed

his down Smash range got nerfed - again - and his blaster now has more endlag

is basically untouched, aside from a small buff to Eigaon

got a lot of nice QoL buffs; up smash works now and he has better UAir

also seems to have quite a bit of nice upgrades, FAir and BAir are stronger now

untouched - outside of a buffed rapid jab

untouched

got some buffs but, they don't seem too significant honestly





all got a laundry list of buffs, buffs and more buffs - mains better check these out cause I'm no expert on these
There's a lot more here to digest.