Just a peek from a wedding a few weeks ago - there is a massive tree close to where the Bride and Groom were getting married, I managed to talk them into coming here for a pic. Really happy with the result....
Nice shot but for me the couple are too dwarfed - to the point where it looks like you have placed them there and the proportions are wrong.
A close crop with the tree as the background texture might be interesting.
Just my $0.02
I am speaking as someone without any professional experience ( any experience really ) so take it for what it is worth, but my first impression of this photo was that I was in the land of Lilliputians and the tree was Gulliver. They're IMO "dwarfed" by the tree. Like was mentioned, maybe crop closer.