Did a B2B 3 and 4-night on Indy on July and doing another 4-night next month.
I think Indy was amped in 2018 or so. We loved Playmakers for both the drinks and the food; the rest of the amped features weren't important to us.
There is Grease, an ice show, and a headliner (could be anything from comedy to juggling to singing), and plenty of live music in the different bars/venues. More than enough nightly entertainment for such a short cruise, IMO.
I can't speak to Liberty but the entertainment across Freedom class should be quite similar.
I'd be happy to answer specific Indy questions if I can.