Look, whoever complained about the children's choir is insane and I seriously doubt Razor&Tie would let that affect their decision (although these are the same people who took out Vanessa's bisexuality and atheism from her Wikipedia page not once, but twice, so perhaps you're onto something). Personally I would be more worried about all of the Twitter complaints that she didn't sound good and looked like Snooki XD
"Can't" can mean one of two things - either they literally cannot do it for legal reasons, OR Vanessa meant "can't" like they simply refused and it was a nonstarter. But that second option doesn't make sense because Bride is one of the highest-selling tracks off the album, so there must be something preventing them from doing it. Very strange that they would make all this noise about it (the single cover, the website's new splash page, making plans to record a video, etc) without making sure they could actually release the song first.
It's kinda cool that HTB is gonna be played on One Tree Hill - I have no plans to ever watch that show, but it's kinda like how Hands On Me was on Gossip Girl; it's good publicity. But I feel like Bride could have been EVERYWHERE.