[WraithLord]

Fielding squads of giants has its weaknesses too. For example, probably the most efficient way to play Hinom is take strong bless and expand/fight with small squads of giants and/or SCs. In the early to mid game a competent player can counter this quite effectively. For example a human nation can field armies designed to swarm the giants backed by mages scripted to stop them (with entangle, fire bonds, false fetters for example).

They don't have stealth units so a stealthy nation like Pangaea can give them extremely hard time.

The Hinom SCs flavor text implies that they may hurt their own population.

Are their mages better than EA TC?

Having said that, I think we need to wait some more time for MP evidence to start coming regarding the new nation's strength. The fact that the AI plays dead to strong bless nations is largely irrelevant to MP.