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Since this was your family and not a paid shoot I will go easy.
Lots of issues with these. Many already mentioned so I won't go repeat them.You do need a lot more light control. His head is bright in #1. Too much flat facial shine in some. See upper cheeks. Next is position.
When doing a group the first thing Not to do a lineup as in these. In #1 you have 2 straight lines and even in the last on the bench you have straight lines.
For example in the last why have 3 on the bench. Why not have one almost laying on the bench with another above her head to bring the 'feel' of them wanting to be together as a family that likes each other. The 3rd could be opposite end of bench with one standing in the middle or holding onto the chain leaning into the frame, next to the standing one, keeping the together look. I can think of 5-6 positions using that bench for the group and none involve straight lines that you used.
That factor alone would take away the snapshot look. That metal bench. Same thing, why not use the top as a seat so you have 3-4 levels. Standing is level 1, but leaning into the photo to show they are connected, on top of bench for level 2 and on the lower seat for level 3 and the arm rail of the bench for level 4, not pushed against the backrest to provide depth ( depth will break that line up ) in addition to the levels.
Watch the brightness in background and foreground as that pulls they attention away from the clients. Not a killer but again take the image to the next quality level with little effort.
The eyes....your number one thing should be eye contact to connect with the viewer, you missed in all shown. Second is connecting the family to show affection etc. Getting there but weak.
Avoid that 'fig leaf' hand position at all cost. Use a pocket, place hand on person next to them ( also connects and shows emotion in photo by touching) or object next to them like chain of bench, railing.
For example in 3 the husband has his hand on her shoulder but she is distant. Looks like one of my girlfriends when I call her the wrong name! See that distance. She should be turned into him and much closer to remove that distance. Turning in means she wants to be there and connects. Also keep hands at a angle. The young girl has 'flat hands' . Makes them big. Turn her hands sideways and one in pocket or something. No flat hands facing camera or bodies either. Always turn them.
Hope this helps. You will be amazed at the differnece if you try a few of these suggestions.