First, thank you for the bit on Home, I was pretty sure that was the way Home played out. That Angel set the terms and WRH fiendishly agreed. The best traps are the one's that we set for ourselves after all, not the one's the "metaphorical" devil or devils set for us.
(WRH is amongst my favorite Whedon villains, for this reason - they always let their victims set their own traps.)

There's other differences between Melody (River Song) and Connor...in that, Melody's birth was a natural one not one manipulated by
the PTB. Melody isn't the Doctor's child. She is actually raised by her parents in the real world (except her parents are her age) not by the kidnappers. She's not tortured like Connor or living in a hell dimension. She falls in love with the Doctor and isn't rebelling against him like a child against a parent.
Nor is she rebelling against Amy Pound. The Doctor isn't Amy Pound's significant other.
And both Melody and the Doctor are Time Lords.
Plus she is saved by killing the Doctor, and Melody unlike Connor goes to prison.

I think Melody/River has more in common with Faith than with Connor actually. Although that's not quite a good fit either - but Faith like River was a bit psychotic, and it took an older powerful man, who had done similar things to understand her and help her find her way - helping her choose to go to prison and like Faith, River is only there because she chooses to be, since she can break out at any time. (The Doctor Who/River story parallels Faith/Angel in some respects...) As for Connor, he has more in common with Donna Noble - who in Doctor Who had her "memories" entirely wiped in order "to save her". (Which I have issues with as well, actually what was done to Donna bothered me more than Home.)