We were just on the 10/14/17 Magic cruise with stop at WDW. We received a letter stating that instead of our KTTW card we would be issued separate park hopper passes. they were left in our room. And yes, you just walk up to an attraction, tap your park hopper and continue through the FP lane.
We went straight to EPCOT on the bus and we walked right to World showcase for the Frozen ride. The regular line was all the way out to the walkway but the FP lane had virtually no one on it. We tapped and walked past easily 200 hundred people. We waited for all of about 5 minutes to get on the ride. After that we went to Future world and did Nemo and some other things before we took the monorail to MK.
Be prepared....the bag check to get into EPCOT was the longest line we had all day. It took a good 20 minutes to get through. Everyone who exits any bus was in the line (and possibly people from the parking lot). I am not sure if there was another line for parking lot people but our line took forever.
Before we went to MK we stopped at the TTC and walked to the Poly for lunch. After lunch we boarded the Poly monorail to MK. Nice thing there was that they did a bag check as you entered the monorail line at the Poly so no bag check when you got to the MK. There were only about 15 people waiting to board the monorail at the Poly so bag check was simple and fast.
MJ