To save on cost, we always took our kids during the off-season. We arranged with our 2 DS's teachers to get their school assignments for the week they'd miss and we'd have them spend a few hours of dedicated quiet study time every day until the work was done. This last time, my oldest managed to get most of it done on the airplane trip from Seattle to MCO. But now that he will be entering high school next year (and this year asked not to miss school--so proud of him, although I think it's so he won't be away from his friends), we will no longer be able to do this. We will likely try another, less expensive cruise line to travel during the summer months. But back to the topic...
My kids hated the kids clubs. They first went when they were 8 and 10--turning 11 on the cruise. They, too, just wanted to hang out with us. I thought it would be better when they could go to Edge, even got special permission for my youngest, who was 10, to be able to go to Edge with his older brother. Nope, wouldn't go--although younger son wanted to go but wanted older brother to go with him for the 1st time. Didn't happen. We just ended up spending a lot of time together as a family, which was great. I was thrilled that my oldest kept saying he just wanted to hang out with us. I expect that as he gets older, those days will slowly disappear.
We had my parents join us on this cruise (my mom has always come with us but this was a first to have my dad come). We had adjoining rooms with verandahs and if we needed a break, we sent the kids over to my parents or they took the kids to see a movie, play mini-golf, etc. As for privacy, my DH and I never expect to get any when we go on vacation with the kids unless we are booking a condo with separate bedrooms. So it was nice to have that extra room.
After the cruise, we did 1-week at WDW/Universal with just the 4 of us. Probably was one of the first times I'd not been stressed going to the parks.
I think a good point raised is to talk to you DH and find out exactly what it was he didn't like about cruising. And your deposit is refundable, so no worries there!