Bought the RM PCA(Zara) and played several games, i thing it is not very outstanding compare with the RM original CAs - Trento/Balzano.
This RM PCA got a little more DP and displacement, but same R-mount space and fewer T-mounts. Seems it should't used to be anti aa/ss in GB.
For its shooting power, the specialist gun - "2x8 Model 1927 Z", compare with the "2x8 EOC W", it has longer reload speed, increased weight and increcased HE damage(only 20 more). But its 50 degree angle is quite useless.
To sum up, the RM PCA Zara is quite hard to contribute much in battle whatever GB or blitz, it is just a big meat for the enemy, and it is quite week compare with the PCAs of other nations.
The original CAs can do the same way.