I take your point about the extra treatment needed.

I would dispute the point about the script writers - her death was required to a) the father's revenge (which may be part of the problem) and b) the Doctor's decision to eliminate the baddies rather than moving them on ("you didn't even know her name" (which ironically, I have now forgotten)).

I will say I was expecting a rescue when she was executed as it was not quick or unavoidable as most such deaths are. Normally goodies only die if the events are too fast for the Doctor to react to (cf the father's death). Normally if there is time, the Doctor would stage a rescue, he may not succeed, but he would usually try. It is also not clear to me he told the father about her being dead - which is why he did not grieve. Both made me feel uncomfortable.