number one eagles fan

So, in cancelling my single reservation for Eden in hopes of rebooking it at a 9% discount, as now advertised on the website, I neglected to read the fine print and notice that they are now charging an 18% gratuity on all specialty restaurant reservations. That was my mistake...although disappointing. So I am now considering a 3 night package for my 12 night cruise. It appears that you can/must reserve dinner for the first night on board but my question is how challenging will it be to reserve the other nights? Will we be stuck with undesirable times and limited to restaurant choice? I'm interested to hear others' experiences with the dinner packages. Thank you in advance!