I really like #1, but would crop them different and put more of the beautiful blurry trees in the back ground, and not so much of the grass, and maybe move the camera up 6 inches, and loose the hat.
also might have them both look at the belly too, see how that works.
Like #4, again, loose the hat
for #5, Love the location, and the use of the railing
1. needs shallower DOF, background is too clear/distracting
2. have him behind her, but chest facing you, lightly leaning against the rail but hand is still on her hand exactly where it is now, she would be looking down at the hands instead of at him?? and Him as well? or at her?? have to play with that. Might bring the camera up a bit there, and see how it changes things.
Just suggestions, and things to try.
Godox/Flashpoint r2 system, plus some canon stuff.