From our trip back in March (things are probably more open now):
Two70 is underutilized. Most of what we saw of it was demonstrating the technology, moving tv screens, music etc. They did not have nightly shows. Pre-Covid, they ran a really "eclectic" show, not last time.
Short trips on North Star were free on port days but all require reservations. The paying trips are longer and go out over the side of the ship as well as up and down. We did it in port at Canaveral. You go up high. That's about it.
iFly is available - you pay for it, reservations required. If you're curious to try it, it's much shorter than what you would get on a visit to one of their land locations, but it's also a lot cheaper. I think your time in the tube is a minute of less (which is enough for just the experience of it).
Bumper cars - also reservations required. You can get in line in case they have no-shows. Limited hours.