These "changes" are slightly misleading. I have been able to go to Cuba several times with a church group, with the understanding and support of the State department and the Cuban government providing I do not criticize the "State".
The stipulation of money not going to the government or the Communist party is a little naive as well. When that money hits those shores, likely it will be taxed to within an inch of the owners life, meaning the Castros will benefit from our largesse. We cannot dictate (no pun intended) how another country taxes its citizens.