It's been a 1 1/2 years since my last Carnival cruise but I don't remember the entertainment being bad, there was a DJ but also live music.
The only change we noticed was in the MDR with service being not as good as in the past, the food for the most part was good certain things stood out other things just so so.
I guess it's what your looking for in a cruise,we don't cruise for enertainment or activitys , we just cruise to chill and live in the moment, hang on the balcony, roam the ship and enjoy the ports.
For what we do it meets our needs but it will be interesting cruising another line in the near future to see what we're missing or not missing.
I have cruised RC one time back in 2000 and couldn't wait to go back to Carnival as Carnival was hands down better back then for us.