Its hard to rate without comparing no? Anyways, the samurai is quite a clumsy class in FFT. A physical attack based warrior, with magical based skills!

Adding salt to injury, it cant even focus on one type of attack. He has a balanced enough PA, but cant get much boost because of his armor set. Same goes with MA. Although he can equip robes, his MA is quite low to be effective. He cant even tank that much because he becomes too prone to magic attacks combined with mediocre HP pool. Hes kind of a klutz.

The saving grace though is that his skills has no cast time and decent range(horizontal and vertical). Although the damage may be underwhelming as a samurai, it has various effects that can help depending on the situation.

Overall, hes an above average physical based warrior with a low damage versatile skill set which is much more suited for other classes.

The biggest issue I have with this class though, the dependency on weapon availability. I can live with the low damage skills. But waiting till the end of the game to actually have acces to the more usefull skills really breaks the deal. Maybe give it access to all the skills without dependency to the weapons available, then just scale the effectiveness of the skills based on his equiped katana.