Episode three started very strong for me (even if it did have the usual sledgehammer-to-the-head subtlety in its political messaging), but when Splice arrived at the landmine it went downhill so fast. Started with a really good premise, well thought-out logical steps of why everything happened as it did.
But in the second half, they just kept throwing more characters and more BS at the problem and trying to pull on audience emotions instead of telling a good story. Like, how does the Doctor holding a corpse mean it's connected to the Internet? I am holding my phone and touching a microwave - is my microwave now connected to the Internet through me??
And gotta agree with OP, Moffat has apparently never met a child in his life. She must have the strongest faith ever to not even flinch after her dad dies. But hang on - why did she go looking for dad if it doesn't matter whether he dies? And why was she upset when Ruby died?