Hi Willy: While I have not reviewed what the Catholic Church has recently said about the JWs, I am sure their statements are moderate for the most part. I was raised Roman Catholic, and our view of the JWs was that they were just another small Protestant fringe group that started up to define their own doctrine and write their own Bible to suit themselves.
Most Catholic comments that I have read in years past simply and factually state the history and dogma that the JWs are known for. The Catholic Church has little else to say 'officially.'
Some Catholic theologians, leaders, and publications have carried articles from time to time that either contain some level of parise for JWs and their consistent dedication to their 'door-to-door' work and other activities, or they contain some level of criticism, such as the JW stand on Blood, etc.
In my opinion, except for certain localized situations where a Catholic congregation and Priests have caused trouble for the JWs, the Church has been moderate and kind overall. Decades ago, in some locations, such as Quebec (Canada), Greece, some strong Catholic pockets in the USA, some European and Asian nations, Catholics and some Priests have caused very bad treatment and persecution for the JWs. Most of this took place in the first half of the 20th Century, and then faded down to a trickle.
After I became a JW, I was subjected to some small amount of mistreatment that at the time I labeled as 'persecution' including some unfortunate interactions with my Priest and relatives. In retrospect, all these events were due to hurt and anger from my Catholic relatives, friends, and Priest. Yet, they never shunned me, or treated me as an outcast 'Apostate.' Their love and patience won out after 25 years. They all were there for me all along, and to welcome me back into the human race. - Amazing