It was watchable. Lots or singing that didn't quite hit the mark like the first one. Took itself a bit serious I think. It was ok, just fell a bit flat. The plot was very basic and most things made no sense at all, like why take the farmer guy? He added nothing to the story and its like he was there just cos they thought he'd get a laugh. Same with the other two, Moana apparently really needed a crew but then there wasn't much of a reason why she needed this crew. Also she just chose the three without much explanation and there characters never really grew or went anywhere.
The bad guy (bat lady) was actually just joking she's now a good guy... ahh ok. Why didn't she just tell Maui that instead of tying him up and keeping him captive until moana arrived.
And back to the singing. It was bland at best. The first movie the songs were catchy and humorous, but moana 2 was just bland and boring. Don't get me wrong, the singer has a great voice, the songs themselves were just meh.