But what if there is no money from the civil suit? I don't think there will be.
I think if the family had ADMITTED some guilt on grandpa's part, and just wanted some partial responsibility from the cruise lines, they might have had a payoff of some kind.
But they have been so aggressive, so publicly accusatory, laying the entire blame at the feet of RCCL--basically calling them out and out murderers. ---
"If it wasn't for RCCL's negligence our baby would still be alive to go see Frozen 2 on her 2nd birthday" 
The aggressive nature of their publicity tour prevents RCCL from extending any conciliatory offers and agreeing to any kind of mutual deals. It would make the cruise line look like they are admitting to negligent manslaughter if they met this family halfway.
Especially if Grandpa is going to reject a deal as good as prosecutors just offered---No jail time, if he just admits to some personal responsibility for the tragic outcome.
His decision to go to trial means he wants a big payout and is willing to gamble his freedom on that.