Well I'm no expert on posed wedding work either, but very much FWIW ...
#1 Not a lot wrong with it as it stands, IMO, but I always think that when the couple are posed facing like this, they really need to be central in the frame (or as near as). Maybe crop it in from the LHS until it's square and see what you think?
#2 I'm not struck with the setting, particularly with that car being visible, but I reckon the biggest improvement would have come from getting him to rotate to his left somewhat until his shoulderline was at the same sort of angle to you as hers is. In other words, so that if you looked down on them, their shoulders would form an arrowhead pointing away from you. He wouldn't then look so awkward.
#3 Expressions are great but it looks a bit carpark to me too. What bugs me about this shot though is actually his shirt sleeve. Theoretically you want about 2cm of cuff showing at the most, but none is better than too much AFAIC. Well done you though for avoiding the other pitfall with the "round her waist" shot i.e. only part of the groom's hand showing so it looks like a claw. This is just right.
#4 What Dan. Spend a bit of time cloning out some of that crap behind them and it'll be a different picture
And yes I
am being picky, but I hope that helps a bit for the next time!