Swords and tachi added through config do not use third attack in combo, instead they use the third attack animation on rush attack, also jump attacks does not deal critical damage but still deplete stamina, and uses rush attack animation.
Greatswords and spears added through config use only first attack animation, rush attacks use second attack animation, jump attacks are same as above.
Axes and longswords added through config are fine. Don't know about daggers though.
All special attacks work fine.

Fixed in 5.0.4.