That's right. Pentecostalism is basically Romanism made over.
Their ministers bless objects in order to infuse miraculous power in them. Ever heard of a "prayer cloth?" Consider also their use of anointing oils.
Both groups are very synergistic in their view of justification, and hold that men can be truly saved and then fall away.
Both groups have a strong emphasis on continuing revelation through dreams and visions, as you said. Also, in both groups, the continuing revelation tends to take the place of the Scriptures.
Neither group holds to a Scripturally regulated form of worship. Whatever extra-biblical revelation dictates is what they follow. So, there's no problem with drama in worship, making up holy days, etc.
Roman Catholicism may be more highbrow, but the two are very similar. It's no wonder that Pentecostalism has caught on among Latin Americans to the extent that it has. It won't surprise me when Pentecostal leaders begin to push for reunification with Rome. Rome, for their part, has already made concessions to the charismatic movement.