imho, yes, a lot of the cards are useless, I never use the statues, the religion game for Italy is weaker than most other civs, and a lot of the espionage/deception/support capabilities of Italy are so convoluted that they are practically useless. I feel like they need to be brought more in line with the other European civs, and they need a different ultimate unit. The Mafioso is a great idea thematically, but for them to be effective ingame the player needs to get to Age 5, while most my games end in 3 or 4.
I definitely agree that their long range could be played with more, and the Grenadieri di Sargenda could (and imo should) be the ultimate unit for Italy, as not only were they formed in this time period, they are the oldest standing regiment in Italy to this day, and they were the personal guards of Emmanuel II, the faction leader for Italy in this mod.
Honestly, I know it was orignally one of their core distinctions, but I would move Italy away from its religion focus, because the KoSJ does the religion integration into their gameplay much more smoothly and thematically than Italy does. I think the Cacciatori should be trainable for the KoSJ, but that's a different thread.