The bugfix mod does the following:

-Enable agility/evade for actual hit/evade mechanics instead of animation-only
-Hit up/down effects altered from no change to +10/-15 accuracy
-Increased chance for critical hits from fixed 0 to 2+LUCK
-LUCK now grants a chance to deny enemy counter moves
-Changed attack bonus of crits from +50% to + (LUCK x weapon factor)/3
-(for monsters, treat level/4 as weapon factor)
-Reduced damage of regular attacks for dual attackers by 25%
-Reduced Kevin’s wolf form bonus from +15% to +10%
-Reduced power up/down effect from +33% to +20%
-Apply 300 def cap before buffs instead of after
-Corrected issue with level-ups where max stats were sometimes those of later levels
-Force attack recalculation on map transition to prevent wolf bonus stacking abuse
-Tran Shape has fixed duration of 12 instead of 25 minus LUCK
-Heal Light no longer “heals” max HP up/down (effect was only visible on next max HP check)
-Heal Light is no longer reduced on a target that has m.def up (or increased with m.def down)
-Prevent HP overflow from healing enemies with 65k+ HP
-Changed energy ball from crit rate = 1/2 to crit rate x1.5
-Blaze Wall, Flame Breath, Demon Breath and Lava Wave no longer remove status ailments from the target (they try to inflict non-existing burn state)
-Fixed Kevin’s Death Hand and Dervish being mixed up in menu
-Fixed level of Gemstone Valley mobs that are stuck at Lv28 instead of growing with plot progress like their neighbors
-Removed check that sets LUCK to max if it is 20 or above on any kill
-Fixed that the day bonus on melee attacks checking for the target’s saber instead of the attacker’s
-Added element check on Lv2/3 techs
-(immune, absorb and reflect deal 1 damage instead of their real effects)
-Fixed magic shield only applying half of the magic defense effect mind up gives
-Fixed cast time progressing while menu is open
-Fixed spell damage calculation using the level of the target instead of the caster for the 60%/90% bonus
-Changed the level based bonus to a gradual increase by level instead of a sudden spike going from 19 to 20 and 39 to 40
-Added exp rubber-banding if your highest leveled party member is below the monster’s level
-Added extra patch to remove cast time of spells (optional)
-Added extra patch to always get a chest after battle (optional)
-Added extra patch to boost all elements on Mana Day (optional)