Looking at the new inheritable skills

Safeguard+: holy balls this weapon is a broken inheritabe skill. +7 defense when attacked, as well as likely access to refinement. This weapon with a def refine can turn units with even the more mundane defensive stats into absolute walls.
Firestorm dance 2: great new dancer skill, will be very intimidating when combined with blade tome units.
Odd attack wave: I think there's already huge potential lying in the fact that this skill can self-buff. This makes it probably the new go-to c-slot skill for any unit, but especially ones running brave weapons or blade tomes. The fact that it only works on odd turns is a drawback, but with good spacing that shouldn't be a big issue.